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Finding the Fourth Proportional to 615,175.20, 921,769.20 and 348,141.60

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Solution

The fourth proportional to 615,175.20, 921,769.20 and 348,141.60 is: 521,650.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,175.20 : 921,769.20 = 348,141.60 : x
  2. Step 2: Convert to fraction form
    615,175.20/921,769.20 = 348,141.60/x
  3. Step 3: Cross multiply
    615,175.20x = 921,769.20 × 348,141.60
  4. Step 4: Simplify right side
    615,175.20x = 320,906,204,118.72
  5. Step 5: Solve for x
    x = 320,906,204,118.72/615,175.20
  6. Step 6: Final answer
    x = 521,650.10

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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.