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Finding the Fourth Proportional to 699,044.40, 964,672.08 and 393,120.68

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Solution

The fourth proportional to 699,044.40, 964,672.08 and 393,120.68 is: 542,501.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    699,044.40 : 964,672.08 = 393,120.68 : x
  2. Step 2: Convert to fraction form
    699,044.40/964,672.08 = 393,120.68/x
  3. Step 3: Cross multiply
    699,044.40x = 964,672.08 × 393,120.68
  4. Step 4: Simplify right side
    699,044.40x = 379,232,544,066.61
  5. Step 5: Solve for x
    x = 379,232,544,066.61/699,044.40
  6. Step 6: Final answer
    x = 542,501.37

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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.