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Finding the Fourth Proportional to 459,116.70, 687,119.85 and 459,116.70

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Solution

The fourth proportional to 459,116.70, 687,119.85 and 459,116.70 is: 687,119.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,116.70 : 687,119.85 = 459,116.70 : x
  2. Step 2: Convert to fraction form
    459,116.70/687,119.85 = 459,116.70/x
  3. Step 3: Cross multiply
    459,116.70x = 687,119.85 × 459,116.70
  4. Step 4: Simplify right side
    459,116.70x = 315,468,198,036.50
  5. Step 5: Solve for x
    x = 315,468,198,036.50/459,116.70
  6. Step 6: Final answer
    x = 687,119.85

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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.