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Finding the Fourth Proportional to 424,235.80, 636,339.30 and 108,695.80

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Solution

The fourth proportional to 424,235.80, 636,339.30 and 108,695.80 is: 163,040.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,235.80 : 636,339.30 = 108,695.80 : x
  2. Step 2: Convert to fraction form
    424,235.80/636,339.30 = 108,695.80/x
  3. Step 3: Cross multiply
    424,235.80x = 636,339.30 × 108,695.80
  4. Step 4: Simplify right side
    424,235.80x = 69,167,409,284.94
  5. Step 5: Solve for x
    x = 69,167,409,284.94/424,235.80
  6. Step 6: Final answer
    x = 163,040.01

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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.