Home / 664,972.20-997,458.30-455,020.20

Finding the Fourth Proportional to 664,972.20, 997,458.30 and 455,020.20

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Solution

The fourth proportional to 664,972.20, 997,458.30 and 455,020.20 is: 682,530.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,972.20 : 997,458.30 = 455,020.20 : x
  2. Step 2: Convert to fraction form
    664,972.20/997,458.30 = 455,020.20/x
  3. Step 3: Cross multiply
    664,972.20x = 997,458.30 × 455,020.20
  4. Step 4: Simplify right side
    664,972.20x = 453,863,675,157.66
  5. Step 5: Solve for x
    x = 453,863,675,157.66/664,972.20
  6. Step 6: Final answer
    x = 682,530.30

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Half scale
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Double scale
Find fourth proportional to 664,973.20, 997,459.80 and 455,021.20
Similar ratio
Find fourth proportional to 997,458.30, 1,496,187.45 and 682,530.30
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.