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Finding the Fourth Proportional to 459,407.28, 689,110.92 and 143,888.88

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Solution

The fourth proportional to 459,407.28, 689,110.92 and 143,888.88 is: 215,833.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,407.28 : 689,110.92 = 143,888.88 : x
  2. Step 2: Convert to fraction form
    459,407.28/689,110.92 = 143,888.88/x
  3. Step 3: Cross multiply
    459,407.28x = 689,110.92 × 143,888.88
  4. Step 4: Simplify right side
    459,407.28x = 99,155,398,474.57
  5. Step 5: Solve for x
    x = 99,155,398,474.57/459,407.28
  6. Step 6: Final answer
    x = 215,833.32

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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.