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Finding the Fourth Proportional to 424,153.18, 636,213.15 and 143,670.42

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Solution

The fourth proportional to 424,153.18, 636,213.15 and 143,670.42 is: 215,500.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,153.18 : 636,213.15 = 143,670.42 : x
  2. Step 2: Convert to fraction form
    424,153.18/636,213.15 = 143,670.42/x
  3. Step 3: Cross multiply
    424,153.18x = 636,213.15 × 143,670.42
  4. Step 4: Simplify right side
    424,153.18x = 91,405,010,470.02
  5. Step 5: Solve for x
    x = 91,405,010,470.02/424,153.18
  6. Step 6: Final answer
    x = 215,500.00

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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.