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Finding the Fourth Proportional to 951.56, 1,313.36 and 619.40

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Solution

The fourth proportional to 951.56, 1,313.36 and 619.40 is: 854.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    951.56 : 1,313.36 = 619.40 : x
  2. Step 2: Convert to fraction form
    951.56/1,313.36 = 619.40/x
  3. Step 3: Cross multiply
    951.56x = 1,313.36 × 619.40
  4. Step 4: Simplify right side
    951.56x = 813,495.18
  5. Step 5: Solve for x
    x = 813,495.18/951.56
  6. Step 6: Final answer
    x = 854.91

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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.