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Finding the Fourth Proportional to 459,008.70, 687,200.85 and 281,861.70

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Solution

The fourth proportional to 459,008.70, 687,200.85 and 281,861.70 is: 421,986.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,008.70 : 687,200.85 = 281,861.70 : x
  2. Step 2: Convert to fraction form
    459,008.70/687,200.85 = 281,861.70/x
  3. Step 3: Cross multiply
    459,008.70x = 687,200.85 × 281,861.70
  4. Step 4: Simplify right side
    459,008.70x = 193,695,599,822.45
  5. Step 5: Solve for x
    x = 193,695,599,822.45/459,008.70
  6. Step 6: Final answer
    x = 421,986.77

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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.