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Finding the Fourth Proportional to 424,069.80, 636,104.70 and 143,587.05

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Solution

The fourth proportional to 424,069.80, 636,104.70 and 143,587.05 is: 215,380.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,069.80 : 636,104.70 = 143,587.05 : x
  2. Step 2: Convert to fraction form
    424,069.80/636,104.70 = 143,587.05/x
  3. Step 3: Cross multiply
    424,069.80x = 636,104.70 × 143,587.05
  4. Step 4: Simplify right side
    424,069.80x = 91,336,397,364.14
  5. Step 5: Solve for x
    x = 91,336,397,364.14/424,069.80
  6. Step 6: Final answer
    x = 215,380.58

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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.