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Finding the Fourth Proportional to 951.06, 1,312.56 and 558.21

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Solution

The fourth proportional to 951.06, 1,312.56 and 558.21 is: 770.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    951.06 : 1,312.56 = 558.21 : x
  2. Step 2: Convert to fraction form
    951.06/1,312.56 = 558.21/x
  3. Step 3: Cross multiply
    951.06x = 1,312.56 × 558.21
  4. Step 4: Simplify right side
    951.06x = 732,684.12
  5. Step 5: Solve for x
    x = 732,684.12/951.06
  6. Step 6: Final answer
    x = 770.39

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Half scale
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Double scale
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1.5x scale

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.