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Finding the Fourth Proportional to 665,053.20, 997,579.80 and 455,101.20

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Solution

The fourth proportional to 665,053.20, 997,579.80 and 455,101.20 is: 682,651.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,053.20 : 997,579.80 = 455,101.20 : x
  2. Step 2: Convert to fraction form
    665,053.20/997,579.80 = 455,101.20/x
  3. Step 3: Cross multiply
    665,053.20x = 997,579.80 × 455,101.20
  4. Step 4: Simplify right side
    665,053.20x = 453,999,764,075.76
  5. Step 5: Solve for x
    x = 453,999,764,075.76/665,053.20
  6. Step 6: Final answer
    x = 682,651.80

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Half scale
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Double scale
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Similar ratio
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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.