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Finding the Fourth Proportional to 858,613.80, 1,287,920.70 and 606,671.40

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Solution

The fourth proportional to 858,613.80, 1,287,920.70 and 606,671.40 is: 910,007.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,613.80 : 1,287,920.70 = 606,671.40 : x
  2. Step 2: Convert to fraction form
    858,613.80/1,287,920.70 = 606,671.40/x
  3. Step 3: Cross multiply
    858,613.80x = 1,287,920.70 × 606,671.40
  4. Step 4: Simplify right side
    858,613.80x = 781,344,654,157.98
  5. Step 5: Solve for x
    x = 781,344,654,157.98/858,613.80
  6. Step 6: Final answer
    x = 910,007.10

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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.