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Finding the Fourth Proportional to 438,818.28, 605,613.92 and 316,411.32

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Solution

The fourth proportional to 438,818.28, 605,613.92 and 316,411.32 is: 436,679.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,818.28 : 605,613.92 = 316,411.32 : x
  2. Step 2: Convert to fraction form
    438,818.28/605,613.92 = 316,411.32/x
  3. Step 3: Cross multiply
    438,818.28x = 605,613.92 × 316,411.32
  4. Step 4: Simplify right side
    438,818.28x = 191,623,099,837.57
  5. Step 5: Solve for x
    x = 191,623,099,837.57/438,818.28
  6. Step 6: Final answer
    x = 436,679.85

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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.