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Finding the Fourth Proportional to 247,291.28, 341,280.29 and 138,406.51

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Solution

The fourth proportional to 247,291.28, 341,280.29 and 138,406.51 is: 191,011.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,291.28 : 341,280.29 = 138,406.51 : x
  2. Step 2: Convert to fraction form
    247,291.28/341,280.29 = 138,406.51/x
  3. Step 3: Cross multiply
    247,291.28x = 341,280.29 × 138,406.51
  4. Step 4: Simplify right side
    247,291.28x = 47,235,411,472.25
  5. Step 5: Solve for x
    x = 47,235,411,472.25/247,291.28
  6. Step 6: Final answer
    x = 191,011.23

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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.