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Finding the Fourth Proportional to 880.13, 1,319.46 and 554.78

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Solution

The fourth proportional to 880.13, 1,319.46 and 554.78 is: 831.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    880.13 : 1,319.46 = 554.78 : x
  2. Step 2: Convert to fraction form
    880.13/1,319.46 = 554.78/x
  3. Step 3: Cross multiply
    880.13x = 1,319.46 × 554.78
  4. Step 4: Simplify right side
    880.13x = 732,011.24
  5. Step 5: Solve for x
    x = 732,011.24/880.13
  6. Step 6: Final answer
    x = 831.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.