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Finding the Fourth Proportional to 418,559.68, 628,025.12 and 238,638.52

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Solution

The fourth proportional to 418,559.68, 628,025.12 and 238,638.52 is: 358,063.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,559.68 : 628,025.12 = 238,638.52 : x
  2. Step 2: Convert to fraction form
    418,559.68/628,025.12 = 238,638.52/x
  3. Step 3: Cross multiply
    418,559.68x = 628,025.12 × 238,638.52
  4. Step 4: Simplify right side
    418,559.68x = 149,870,985,159.62
  5. Step 5: Solve for x
    x = 149,870,985,159.62/418,559.68
  6. Step 6: Final answer
    x = 358,063.60

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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.