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Finding the Fourth Proportional to 690,575.70, 953,042.27 and 418,655.06

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Solution

The fourth proportional to 690,575.70, 953,042.27 and 418,655.06 is: 577,772.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,575.70 : 953,042.27 = 418,655.06 : x
  2. Step 2: Convert to fraction form
    690,575.70/953,042.27 = 418,655.06/x
  3. Step 3: Cross multiply
    690,575.70x = 953,042.27 × 418,655.06
  4. Step 4: Simplify right side
    690,575.70x = 398,995,961,870.90
  5. Step 5: Solve for x
    x = 398,995,961,870.90/690,575.70
  6. Step 6: Final answer
    x = 577,772.95

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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.