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Finding the Fourth Proportional to 718.70, 1,077.83 and 348.28

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Solution

The fourth proportional to 718.70, 1,077.83 and 348.28 is: 522.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    718.70 : 1,077.83 = 348.28 : x
  2. Step 2: Convert to fraction form
    718.70/1,077.83 = 348.28/x
  3. Step 3: Cross multiply
    718.70x = 1,077.83 × 348.28
  4. Step 4: Simplify right side
    718.70x = 375,382.20
  5. Step 5: Solve for x
    x = 375,382.20/718.70
  6. Step 6: Final answer
    x = 522.31

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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.