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Finding the Fourth Proportional to 951.42, 1,312.97 and 558.45

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Solution

The fourth proportional to 951.42, 1,312.97 and 558.45 is: 770.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    951.42 : 1,312.97 = 558.45 : x
  2. Step 2: Convert to fraction form
    951.42/1,312.97 = 558.45/x
  3. Step 3: Cross multiply
    951.42x = 1,312.97 × 558.45
  4. Step 4: Simplify right side
    951.42x = 733,228.10
  5. Step 5: Solve for x
    x = 733,228.10/951.42
  6. Step 6: Final answer
    x = 770.67

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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.