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Finding the Fourth Proportional to 951.42, 1,312.16 and 619.76

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Solution

The fourth proportional to 951.42, 1,312.16 and 619.76 is: 854.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    951.42 : 1,312.16 = 619.76 : x
  2. Step 2: Convert to fraction form
    951.42/1,312.16 = 619.76/x
  3. Step 3: Cross multiply
    951.42x = 1,312.16 × 619.76
  4. Step 4: Simplify right side
    951.42x = 813,224.28
  5. Step 5: Solve for x
    x = 813,224.28/951.42
  6. Step 6: Final answer
    x = 854.75

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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.