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Finding the Fourth Proportional to 715,956.34, 988,023.45 and 393,687.31

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Solution

The fourth proportional to 715,956.34, 988,023.45 and 393,687.31 is: 543,290.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,956.34 : 988,023.45 = 393,687.31 : x
  2. Step 2: Convert to fraction form
    715,956.34/988,023.45 = 393,687.31/x
  3. Step 3: Cross multiply
    715,956.34x = 988,023.45 × 393,687.31
  4. Step 4: Simplify right side
    715,956.34x = 388,972,294,247.42
  5. Step 5: Solve for x
    x = 388,972,294,247.42/715,956.34
  6. Step 6: Final answer
    x = 543,290.52

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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.