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Finding the Fourth Proportional to 459,398.28, 689,097.42 and 143,879.88

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Solution

The fourth proportional to 459,398.28, 689,097.42 and 143,879.88 is: 215,819.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,398.28 : 689,097.42 = 143,879.88 : x
  2. Step 2: Convert to fraction form
    459,398.28/689,097.42 = 143,879.88/x
  3. Step 3: Cross multiply
    459,398.28x = 689,097.42 × 143,879.88
  4. Step 4: Simplify right side
    459,398.28x = 99,147,254,097.91
  5. Step 5: Solve for x
    x = 99,147,254,097.91/459,398.28
  6. Step 6: Final answer
    x = 215,819.82

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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.