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Finding the Fourth Proportional to 876.76, 1,314.03 and 413.52

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Solution

The fourth proportional to 876.76, 1,314.03 and 413.52 is: 619.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    876.76 : 1,314.03 = 413.52 : x
  2. Step 2: Convert to fraction form
    876.76/1,314.03 = 413.52/x
  3. Step 3: Cross multiply
    876.76x = 1,314.03 × 413.52
  4. Step 4: Simplify right side
    876.76x = 543,377.69
  5. Step 5: Solve for x
    x = 543,377.69/876.76
  6. Step 6: Final answer
    x = 619.76

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1.5x scale

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.