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Finding the Fourth Proportional to 1,300.95, 1,951.11 and 479.32

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Solution

The fourth proportional to 1,300.95, 1,951.11 and 479.32 is: 718.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,300.95 : 1,951.11 = 479.32 : x
  2. Step 2: Convert to fraction form
    1,300.95/1,951.11 = 479.32/x
  3. Step 3: Cross multiply
    1,300.95x = 1,951.11 × 479.32
  4. Step 4: Simplify right side
    1,300.95x = 935,201.17
  5. Step 5: Solve for x
    x = 935,201.17/1,300.95
  6. Step 6: Final answer
    x = 718.86

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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.