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Finding the Fourth Proportional to 1,300.70, 1,951.31 and 478.97

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Solution

The fourth proportional to 1,300.70, 1,951.31 and 478.97 is: 718.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,300.70 : 1,951.31 = 478.97 : x
  2. Step 2: Convert to fraction form
    1,300.70/1,951.31 = 478.97/x
  3. Step 3: Cross multiply
    1,300.70x = 1,951.31 × 478.97
  4. Step 4: Simplify right side
    1,300.70x = 934,625.99
  5. Step 5: Solve for x
    x = 934,625.99/1,300.70
  6. Step 6: Final answer
    x = 718.56

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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.