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Finding the Fourth Proportional to 615,705.20, 921,808.20 and 552,719.60

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Solution

The fourth proportional to 615,705.20, 921,808.20 and 552,719.60 is: 827,508.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,705.20 : 921,808.20 = 552,719.60 : x
  2. Step 2: Convert to fraction form
    615,705.20/921,808.20 = 552,719.60/x
  3. Step 3: Cross multiply
    615,705.20x = 921,808.20 × 552,719.60
  4. Step 4: Simplify right side
    615,705.20x = 509,501,459,580.72
  5. Step 5: Solve for x
    x = 509,501,459,580.72/615,705.20
  6. Step 6: Final answer
    x = 827,508.78

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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.