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Finding the Fourth Proportional to 951.41, 1,312.56 and 619.72

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Solution

The fourth proportional to 951.41, 1,312.56 and 619.72 is: 854.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    951.41 : 1,312.56 = 619.72 : x
  2. Step 2: Convert to fraction form
    951.41/1,312.56 = 619.72/x
  3. Step 3: Cross multiply
    951.41x = 1,312.56 × 619.72
  4. Step 4: Simplify right side
    951.41x = 813,416.40
  5. Step 5: Solve for x
    x = 813,416.40/951.41
  6. Step 6: Final answer
    x = 854.96

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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.