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Finding the Fourth Proportional to 442,915.20, 664,372.80 and 147,427.20

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Solution

The fourth proportional to 442,915.20, 664,372.80 and 147,427.20 is: 221,140.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,915.20 : 664,372.80 = 147,427.20 : x
  2. Step 2: Convert to fraction form
    442,915.20/664,372.80 = 147,427.20/x
  3. Step 3: Cross multiply
    442,915.20x = 664,372.80 × 147,427.20
  4. Step 4: Simplify right side
    442,915.20x = 97,946,621,660.16
  5. Step 5: Solve for x
    x = 97,946,621,660.16/442,915.20
  6. Step 6: Final answer
    x = 221,140.80

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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.