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Finding the Fourth Proportional to 5,378.76, 7,422.42 and 3,254.76

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Solution

The fourth proportional to 5,378.76, 7,422.42 and 3,254.76 is: 4,491.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,378.76 : 7,422.42 = 3,254.76 : x
  2. Step 2: Convert to fraction form
    5,378.76/7,422.42 = 3,254.76/x
  3. Step 3: Cross multiply
    5,378.76x = 7,422.42 × 3,254.76
  4. Step 4: Simplify right side
    5,378.76x = 24,158,195.72
  5. Step 5: Solve for x
    x = 24,158,195.72/5,378.76
  6. Step 6: Final answer
    x = 4,491.41

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Find fourth proportional to 2,689.38, 3,711.21 and 1,627.38
Half scale
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Double scale
Find fourth proportional to 5,379.76, 7,423.80 and 3,255.76
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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.