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Finding the Fourth Proportional to 424,405.12, 636,607.84 and 108,862

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Solution

The fourth proportional to 424,405.12, 636,607.84 and 108,862 is: 163,293.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,405.12 : 636,607.84 = 108,862 : x
  2. Step 2: Convert to fraction form
    424,405.12/636,607.84 = 108,862/x
  3. Step 3: Cross multiply
    424,405.12x = 636,607.84 × 108,862
  4. Step 4: Simplify right side
    424,405.12x = 69,302,402,678.08
  5. Step 5: Solve for x
    x = 69,302,402,678.08/424,405.12
  6. Step 6: Final answer
    x = 163,293.04

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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.