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Finding the Fourth Proportional to 950.60, 1,312 and 557.60

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Solution

The fourth proportional to 950.60, 1,312 and 557.60 is: 769.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    950.60 : 1,312 = 557.60 : x
  2. Step 2: Convert to fraction form
    950.60/1,312 = 557.60/x
  3. Step 3: Cross multiply
    950.60x = 1,312 × 557.60
  4. Step 4: Simplify right side
    950.60x = 731,571.20
  5. Step 5: Solve for x
    x = 731,571.20/950.60
  6. Step 6: Final answer
    x = 769.59

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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.