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Finding the Fourth Proportional to 681,877.36, 940,801.80 and 391,487.50

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Solution

The fourth proportional to 681,877.36, 940,801.80 and 391,487.50 is: 540,144.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,877.36 : 940,801.80 = 391,487.50 : x
  2. Step 2: Convert to fraction form
    681,877.36/940,801.80 = 391,487.50/x
  3. Step 3: Cross multiply
    681,877.36x = 940,801.80 × 391,487.50
  4. Step 4: Simplify right side
    681,877.36x = 368,312,144,677.50
  5. Step 5: Solve for x
    x = 368,312,144,677.50/681,877.36
  6. Step 6: Final answer
    x = 540,144.26

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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.