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Finding the Fourth Proportional to 418,345.48, 627,512.70 and 102,805.16

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Solution

The fourth proportional to 418,345.48, 627,512.70 and 102,805.16 is: 154,206.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,345.48 : 627,512.70 = 102,805.16 : x
  2. Step 2: Convert to fraction form
    418,345.48/627,512.70 = 102,805.16/x
  3. Step 3: Cross multiply
    418,345.48x = 627,512.70 × 102,805.16
  4. Step 4: Simplify right side
    418,345.48x = 64,511,543,525.53
  5. Step 5: Solve for x
    x = 64,511,543,525.53/418,345.48
  6. Step 6: Final answer
    x = 154,206.38

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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.