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Finding the Fourth Proportional to 505,423.60, 756,061.80 and 455,657.20

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Solution

The fourth proportional to 505,423.60, 756,061.80 and 455,657.20 is: 681,616.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,423.60 : 756,061.80 = 455,657.20 : x
  2. Step 2: Convert to fraction form
    505,423.60/756,061.80 = 455,657.20/x
  3. Step 3: Cross multiply
    505,423.60x = 756,061.80 × 455,657.20
  4. Step 4: Simplify right side
    505,423.60x = 344,505,002,814.96
  5. Step 5: Solve for x
    x = 344,505,002,814.96/505,423.60
  6. Step 6: Final answer
    x = 681,616.38

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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.