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Finding the Fourth Proportional to 861,238, 1,291,480.04 and 434,511.28

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Solution

The fourth proportional to 861,238, 1,291,480.04 and 434,511.28 is: 651,576.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,238 : 1,291,480.04 = 434,511.28 : x
  2. Step 2: Convert to fraction form
    861,238/1,291,480.04 = 434,511.28/x
  3. Step 3: Cross multiply
    861,238x = 1,291,480.04 × 434,511.28
  4. Step 4: Simplify right side
    861,238x = 561,162,645,274.85
  5. Step 5: Solve for x
    x = 561,162,645,274.85/861,238
  6. Step 6: Final answer
    x = 651,576.74

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.