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Finding the Fourth Proportional to 424,405.51, 636,686.87 and 140,115.89

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Solution

The fourth proportional to 424,405.51, 636,686.87 and 140,115.89 is: 210,199.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,405.51 : 636,686.87 = 140,115.89 : x
  2. Step 2: Convert to fraction form
    424,405.51/636,686.87 = 140,115.89/x
  3. Step 3: Cross multiply
    424,405.51x = 636,686.87 × 140,115.89
  4. Step 4: Simplify right side
    424,405.51x = 89,209,948,332.50
  5. Step 5: Solve for x
    x = 89,209,948,332.50/424,405.51
  6. Step 6: Final answer
    x = 210,199.79

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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.