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Finding the Fourth Proportional to 880.65, 1,318.55 and 572.85

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Solution

The fourth proportional to 880.65, 1,318.55 and 572.85 is: 857.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    880.65 : 1,318.55 = 572.85 : x
  2. Step 2: Convert to fraction form
    880.65/1,318.55 = 572.85/x
  3. Step 3: Cross multiply
    880.65x = 1,318.55 × 572.85
  4. Step 4: Simplify right side
    880.65x = 755,328.50
  5. Step 5: Solve for x
    x = 755,328.50/880.65
  6. Step 6: Final answer
    x = 857.69

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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.