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Finding the Fourth Proportional to 442,875.20, 664,312.48 and 147,387.20

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Solution

The fourth proportional to 442,875.20, 664,312.48 and 147,387.20 is: 221,080.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,875.20 : 664,312.48 = 147,387.20 : x
  2. Step 2: Convert to fraction form
    442,875.20/664,312.48 = 147,387.20/x
  3. Step 3: Cross multiply
    442,875.20x = 664,312.48 × 147,387.20
  4. Step 4: Simplify right side
    442,875.20x = 97,911,156,352.26
  5. Step 5: Solve for x
    x = 97,911,156,352.26/442,875.20
  6. Step 6: Final answer
    x = 221,080.69

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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.