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Finding the Fourth Proportional to 487,804.20, 731,487.60 and 221,427.60

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Solution

The fourth proportional to 487,804.20, 731,487.60 and 221,427.60 is: 332,042.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,804.20 : 731,487.60 = 221,427.60 : x
  2. Step 2: Convert to fraction form
    487,804.20/731,487.60 = 221,427.60/x
  3. Step 3: Cross multiply
    487,804.20x = 731,487.60 × 221,427.60
  4. Step 4: Simplify right side
    487,804.20x = 161,971,543,697.76
  5. Step 5: Solve for x
    x = 161,971,543,697.76/487,804.20
  6. Step 6: Final answer
    x = 332,042.13

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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.