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Finding the Fourth Proportional to 880.18, 1,319.85 and 515.05

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Solution

The fourth proportional to 880.18, 1,319.85 and 515.05 is: 772.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    880.18 : 1,319.85 = 515.05 : x
  2. Step 2: Convert to fraction form
    880.18/1,319.85 = 515.05/x
  3. Step 3: Cross multiply
    880.18x = 1,319.85 × 515.05
  4. Step 4: Simplify right side
    880.18x = 679,788.74
  5. Step 5: Solve for x
    x = 679,788.74/880.18
  6. Step 6: Final answer
    x = 772.33

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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.