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Finding the Fourth Proportional to 877.10, 1,315.46 and 329.32

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Solution

The fourth proportional to 877.10, 1,315.46 and 329.32 is: 493.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    877.10 : 1,315.46 = 329.32 : x
  2. Step 2: Convert to fraction form
    877.10/1,315.46 = 329.32/x
  3. Step 3: Cross multiply
    877.10x = 1,315.46 × 329.32
  4. Step 4: Simplify right side
    877.10x = 433,206.46
  5. Step 5: Solve for x
    x = 433,206.46/877.10
  6. Step 6: Final answer
    x = 493.91

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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.