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Finding the Fourth Proportional to 661,532.32, 913,001.79 and 643,518.73

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Solution

The fourth proportional to 661,532.32, 913,001.79 and 643,518.73 is: 888,140.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,532.32 : 913,001.79 = 643,518.73 : x
  2. Step 2: Convert to fraction form
    661,532.32/913,001.79 = 643,518.73/x
  3. Step 3: Cross multiply
    661,532.32x = 913,001.79 × 643,518.73
  4. Step 4: Simplify right side
    661,532.32x = 587,533,752,388.53
  5. Step 5: Solve for x
    x = 587,533,752,388.53/661,532.32
  6. Step 6: Final answer
    x = 888,140.66

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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.