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Finding the Fourth Proportional to 690,319.32, 952,387.84 and 418,190.91

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Solution

The fourth proportional to 690,319.32, 952,387.84 and 418,190.91 is: 576,950.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,319.32 : 952,387.84 = 418,190.91 : x
  2. Step 2: Convert to fraction form
    690,319.32/952,387.84 = 418,190.91/x
  3. Step 3: Cross multiply
    690,319.32x = 952,387.84 × 418,190.91
  4. Step 4: Simplify right side
    690,319.32x = 398,279,937,482.53
  5. Step 5: Solve for x
    x = 398,279,937,482.53/690,319.32
  6. Step 6: Final answer
    x = 576,950.30

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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.