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Finding the Fourth Proportional to 1,025.46, 1,539.10 and 477.95

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Solution

The fourth proportional to 1,025.46, 1,539.10 and 477.95 is: 717.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,025.46 : 1,539.10 = 477.95 : x
  2. Step 2: Convert to fraction form
    1,025.46/1,539.10 = 477.95/x
  3. Step 3: Cross multiply
    1,025.46x = 1,539.10 × 477.95
  4. Step 4: Simplify right side
    1,025.46x = 735,614.40
  5. Step 5: Solve for x
    x = 735,614.40/1,025.46
  6. Step 6: Final answer
    x = 717.35

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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.