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Finding the Fourth Proportional to 669,517.78, 924,068.64 and 397,736.66

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Solution

The fourth proportional to 669,517.78, 924,068.64 and 397,736.66 is: 548,956.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    669,517.78 : 924,068.64 = 397,736.66 : x
  2. Step 2: Convert to fraction form
    669,517.78/924,068.64 = 397,736.66/x
  3. Step 3: Cross multiply
    669,517.78x = 924,068.64 × 397,736.66
  4. Step 4: Simplify right side
    669,517.78x = 367,535,974,484.34
  5. Step 5: Solve for x
    x = 367,535,974,484.34/669,517.78
  6. Step 6: Final answer
    x = 548,956.26

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.