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Finding the Fourth Proportional to 528,242.40, 791,531.28 and 408,591.84

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Solution

The fourth proportional to 528,242.40, 791,531.28 and 408,591.84 is: 612,243.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,242.40 : 791,531.28 = 408,591.84 : x
  2. Step 2: Convert to fraction form
    528,242.40/791,531.28 = 408,591.84/x
  3. Step 3: Cross multiply
    528,242.40x = 791,531.28 × 408,591.84
  4. Step 4: Simplify right side
    528,242.40x = 323,413,222,112.76
  5. Step 5: Solve for x
    x = 323,413,222,112.76/528,242.40
  6. Step 6: Final answer
    x = 612,243.97

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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.