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Finding the Fourth Proportional to 951.60, 1,313.01 and 578.79

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Solution

The fourth proportional to 951.60, 1,313.01 and 578.79 is: 798.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    951.60 : 1,313.01 = 578.79 : x
  2. Step 2: Convert to fraction form
    951.60/1,313.01 = 578.79/x
  3. Step 3: Cross multiply
    951.60x = 1,313.01 × 578.79
  4. Step 4: Simplify right side
    951.60x = 759,957.06
  5. Step 5: Solve for x
    x = 759,957.06/951.60
  6. Step 6: Final answer
    x = 798.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.