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Finding the Fourth Proportional to 459,416.56, 689,124.84 and 143,875.12

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Solution

The fourth proportional to 459,416.56, 689,124.84 and 143,875.12 is: 215,812.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,416.56 : 689,124.84 = 143,875.12 : x
  2. Step 2: Convert to fraction form
    459,416.56/689,124.84 = 143,875.12/x
  3. Step 3: Cross multiply
    459,416.56x = 689,124.84 × 143,875.12
  4. Step 4: Simplify right side
    459,416.56x = 99,147,919,049.98
  5. Step 5: Solve for x
    x = 99,147,919,049.98/459,416.56
  6. Step 6: Final answer
    x = 215,812.68

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Similar ratio
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1.5x scale

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.