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Finding the Fourth Proportional to 690,318.32, 952,386.46 and 418,189.91

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Solution

The fourth proportional to 690,318.32, 952,386.46 and 418,189.91 is: 576,948.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,318.32 : 952,386.46 = 418,189.91 : x
  2. Step 2: Convert to fraction form
    690,318.32/952,386.46 = 418,189.91/x
  3. Step 3: Cross multiply
    690,318.32x = 952,386.46 × 418,189.91
  4. Step 4: Simplify right side
    690,318.32x = 398,278,402,185.21
  5. Step 5: Solve for x
    x = 398,278,402,185.21/690,318.32
  6. Step 6: Final answer
    x = 576,948.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.