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Finding the Fourth Proportional to 424,215.36, 636,187.80 and 139,852.91

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Solution

The fourth proportional to 424,215.36, 636,187.80 and 139,852.91 is: 209,734.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,215.36 : 636,187.80 = 139,852.91 : x
  2. Step 2: Convert to fraction form
    424,215.36/636,187.80 = 139,852.91/x
  3. Step 3: Cross multiply
    424,215.36x = 636,187.80 × 139,852.91
  4. Step 4: Simplify right side
    424,215.36x = 88,972,717,251.42
  5. Step 5: Solve for x
    x = 88,972,717,251.42/424,215.36
  6. Step 6: Final answer
    x = 209,734.78

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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.