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Finding the Fourth Proportional to 417,563.44, 627,511.57 and 390,677.92

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Solution

The fourth proportional to 417,563.44, 627,511.57 and 390,677.92 is: 587,108.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    417,563.44 : 627,511.57 = 390,677.92 : x
  2. Step 2: Convert to fraction form
    417,563.44/627,511.57 = 390,677.92/x
  3. Step 3: Cross multiply
    417,563.44x = 627,511.57 × 390,677.92
  4. Step 4: Simplify right side
    417,563.44x = 245,154,912,398.06
  5. Step 5: Solve for x
    x = 245,154,912,398.06/417,563.44
  6. Step 6: Final answer
    x = 587,108.19

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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.