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Finding the Fourth Proportional to 613,964.12, 847,257.72 and 342,031.64

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Solution

The fourth proportional to 613,964.12, 847,257.72 and 342,031.64 is: 471,996.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,964.12 : 847,257.72 = 342,031.64 : x
  2. Step 2: Convert to fraction form
    613,964.12/847,257.72 = 342,031.64/x
  3. Step 3: Cross multiply
    613,964.12x = 847,257.72 × 342,031.64
  4. Step 4: Simplify right side
    613,964.12x = 289,788,947,474.26
  5. Step 5: Solve for x
    x = 289,788,947,474.26/613,964.12
  6. Step 6: Final answer
    x = 471,996.55

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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.