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Finding the Fourth Proportional to 615,627.20, 923,440.80 and 172,395.20

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Solution

The fourth proportional to 615,627.20, 923,440.80 and 172,395.20 is: 258,592.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,627.20 : 923,440.80 = 172,395.20 : x
  2. Step 2: Convert to fraction form
    615,627.20/923,440.80 = 172,395.20/x
  3. Step 3: Cross multiply
    615,627.20x = 923,440.80 × 172,395.20
  4. Step 4: Simplify right side
    615,627.20x = 159,196,761,404.16
  5. Step 5: Solve for x
    x = 159,196,761,404.16/615,627.20
  6. Step 6: Final answer
    x = 258,592.80

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Similar ratio
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1.5x scale

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.