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Finding the Fourth Proportional to 418,557.68, 628,022.12 and 238,636.52

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Solution

The fourth proportional to 418,557.68, 628,022.12 and 238,636.52 is: 358,060.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,557.68 : 628,022.12 = 238,636.52 : x
  2. Step 2: Convert to fraction form
    418,557.68/628,022.12 = 238,636.52/x
  3. Step 3: Cross multiply
    418,557.68x = 628,022.12 × 238,636.52
  4. Step 4: Simplify right side
    418,557.68x = 149,869,013,199.82
  5. Step 5: Solve for x
    x = 149,869,013,199.82/418,557.68
  6. Step 6: Final answer
    x = 358,060.60

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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.