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Finding the Fourth Proportional to 720,345.40, 994,283.40 and 475,508.88

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Solution

The fourth proportional to 720,345.40, 994,283.40 and 475,508.88 is: 656,338.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,345.40 : 994,283.40 = 475,508.88 : x
  2. Step 2: Convert to fraction form
    720,345.40/994,283.40 = 475,508.88/x
  3. Step 3: Cross multiply
    720,345.40x = 994,283.40 × 475,508.88
  4. Step 4: Simplify right side
    720,345.40x = 472,790,587,719.75
  5. Step 5: Solve for x
    x = 472,790,587,719.75/720,345.40
  6. Step 6: Final answer
    x = 656,338.73

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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.