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Finding the Fourth Proportional to 418,429.95, 627,639.45 and 102,889.59

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Solution

The fourth proportional to 418,429.95, 627,639.45 and 102,889.59 is: 154,333.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,429.95 : 627,639.45 = 102,889.59 : x
  2. Step 2: Convert to fraction form
    418,429.95/627,639.45 = 102,889.59/x
  3. Step 3: Cross multiply
    418,429.95x = 627,639.45 × 102,889.59
  4. Step 4: Simplify right side
    418,429.95x = 64,577,565,678.33
  5. Step 5: Solve for x
    x = 64,577,565,678.33/418,429.95
  6. Step 6: Final answer
    x = 154,333.04

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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.