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Finding the Fourth Proportional to 731,451.44, 1,007,160 and 640,297.28

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Solution

The fourth proportional to 731,451.44, 1,007,160 and 640,297.28 is: 881,646.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    731,451.44 : 1,007,160 = 640,297.28 : x
  2. Step 2: Convert to fraction form
    731,451.44/1,007,160 = 640,297.28/x
  3. Step 3: Cross multiply
    731,451.44x = 1,007,160 × 640,297.28
  4. Step 4: Simplify right side
    731,451.44x = 644,881,808,524.80
  5. Step 5: Solve for x
    x = 644,881,808,524.80/731,451.44
  6. Step 6: Final answer
    x = 881,646.78

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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.