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Finding the Fourth Proportional to 310,424.76, 465,636.96 and 82,720.47

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Solution

The fourth proportional to 310,424.76, 465,636.96 and 82,720.47 is: 124,080.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,424.76 : 465,636.96 = 82,720.47 : x
  2. Step 2: Convert to fraction form
    310,424.76/465,636.96 = 82,720.47/x
  3. Step 3: Cross multiply
    310,424.76x = 465,636.96 × 82,720.47
  4. Step 4: Simplify right side
    310,424.76x = 38,517,708,180.57
  5. Step 5: Solve for x
    x = 38,517,708,180.57/310,424.76
  6. Step 6: Final answer
    x = 124,080.66

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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.