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Finding the Fourth Proportional to 672,139.70, 1,008,209.55 and 620,818.10

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Solution

The fourth proportional to 672,139.70, 1,008,209.55 and 620,818.10 is: 931,227.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    672,139.70 : 1,008,209.55 = 620,818.10 : x
  2. Step 2: Convert to fraction form
    672,139.70/1,008,209.55 = 620,818.10/x
  3. Step 3: Cross multiply
    672,139.70x = 1,008,209.55 × 620,818.10
  4. Step 4: Simplify right side
    672,139.70x = 625,914,737,232.86
  5. Step 5: Solve for x
    x = 625,914,737,232.86/672,139.70
  6. Step 6: Final answer
    x = 931,227.15

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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.