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Finding the Fourth Proportional to 744.76, 1,027.80 and 557.92

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Solution

The fourth proportional to 744.76, 1,027.80 and 557.92 is: 769.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    744.76 : 1,027.80 = 557.92 : x
  2. Step 2: Convert to fraction form
    744.76/1,027.80 = 557.92/x
  3. Step 3: Cross multiply
    744.76x = 1,027.80 × 557.92
  4. Step 4: Simplify right side
    744.76x = 573,430.18
  5. Step 5: Solve for x
    x = 573,430.18/744.76
  6. Step 6: Final answer
    x = 769.95

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Double scale
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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.