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Finding the Fourth Proportional to 951.66, 1,312.88 and 578.61

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Solution

The fourth proportional to 951.66, 1,312.88 and 578.61 is: 798.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    951.66 : 1,312.88 = 578.61 : x
  2. Step 2: Convert to fraction form
    951.66/1,312.88 = 578.61/x
  3. Step 3: Cross multiply
    951.66x = 1,312.88 × 578.61
  4. Step 4: Simplify right side
    951.66x = 759,642.60
  5. Step 5: Solve for x
    x = 759,642.60/951.66
  6. Step 6: Final answer
    x = 798.23

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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.