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Finding the Fourth Proportional to 4,947.76, 7,419.78 and 1,615.23

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Solution

The fourth proportional to 4,947.76, 7,419.78 and 1,615.23 is: 2,422.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,947.76 : 7,419.78 = 1,615.23 : x
  2. Step 2: Convert to fraction form
    4,947.76/7,419.78 = 1,615.23/x
  3. Step 3: Cross multiply
    4,947.76x = 7,419.78 × 1,615.23
  4. Step 4: Simplify right side
    4,947.76x = 11,984,636.27
  5. Step 5: Solve for x
    x = 11,984,636.27/4,947.76
  6. Step 6: Final answer
    x = 2,422.24

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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.