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Finding the Fourth Proportional to 951.15, 1,312.64 and 558.30

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Solution

The fourth proportional to 951.15, 1,312.64 and 558.30 is: 770.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    951.15 : 1,312.64 = 558.30 : x
  2. Step 2: Convert to fraction form
    951.15/1,312.64 = 558.30/x
  3. Step 3: Cross multiply
    951.15x = 1,312.64 × 558.30
  4. Step 4: Simplify right side
    951.15x = 732,846.91
  5. Step 5: Solve for x
    x = 732,846.91/951.15
  6. Step 6: Final answer
    x = 770.49

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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.