Home / 664,985.10-997,477.65-399,045.90

Finding the Fourth Proportional to 664,985.10, 997,477.65 and 399,045.90

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Solution

The fourth proportional to 664,985.10, 997,477.65 and 399,045.90 is: 598,568.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,985.10 : 997,477.65 = 399,045.90 : x
  2. Step 2: Convert to fraction form
    664,985.10/997,477.65 = 399,045.90/x
  3. Step 3: Cross multiply
    664,985.10x = 997,477.65 × 399,045.90
  4. Step 4: Simplify right side
    664,985.10x = 398,039,366,574.14
  5. Step 5: Solve for x
    x = 398,039,366,574.14/664,985.10
  6. Step 6: Final answer
    x = 598,568.85

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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.