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Finding the Fourth Proportional to 459,350.60, 688,977.30 and 143,790.80

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Solution

The fourth proportional to 459,350.60, 688,977.30 and 143,790.80 is: 215,670.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,350.60 : 688,977.30 = 143,790.80 : x
  2. Step 2: Convert to fraction form
    459,350.60/688,977.30 = 143,790.80/x
  3. Step 3: Cross multiply
    459,350.60x = 688,977.30 × 143,790.80
  4. Step 4: Simplify right side
    459,350.60x = 99,068,597,148.84
  5. Step 5: Solve for x
    x = 99,068,597,148.84/459,350.60
  6. Step 6: Final answer
    x = 215,670.99

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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.