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Finding the Fourth Proportional to 862.76, 1,190.12 and 547.40

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Solution

The fourth proportional to 862.76, 1,190.12 and 547.40 is: 755.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    862.76 : 1,190.12 = 547.40 : x
  2. Step 2: Convert to fraction form
    862.76/1,190.12 = 547.40/x
  3. Step 3: Cross multiply
    862.76x = 1,190.12 × 547.40
  4. Step 4: Simplify right side
    862.76x = 651,463.00
  5. Step 5: Solve for x
    x = 651,463.00/862.76
  6. Step 6: Final answer
    x = 755.10

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.