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Finding the Fourth Proportional to 291,689.36, 437,543.28 and 92,011.52

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Solution

The fourth proportional to 291,689.36, 437,543.28 and 92,011.52 is: 138,020.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,689.36 : 437,543.28 = 92,011.52 : x
  2. Step 2: Convert to fraction form
    291,689.36/437,543.28 = 92,011.52/x
  3. Step 3: Cross multiply
    291,689.36x = 437,543.28 × 92,011.52
  4. Step 4: Simplify right side
    291,689.36x = 40,259,022,258.59
  5. Step 5: Solve for x
    x = 40,259,022,258.59/291,689.36
  6. Step 6: Final answer
    x = 138,020.19

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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.