Home / 345,633.28-518,432.64-135,309.76

Finding the Fourth Proportional to 345,633.28, 518,432.64 and 135,309.76

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Solution

The fourth proportional to 345,633.28, 518,432.64 and 135,309.76 is: 202,957.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,633.28 : 518,432.64 = 135,309.76 : x
  2. Step 2: Convert to fraction form
    345,633.28/518,432.64 = 135,309.76/x
  3. Step 3: Cross multiply
    345,633.28x = 518,432.64 × 135,309.76
  4. Step 4: Simplify right side
    345,633.28x = 70,148,996,094.57
  5. Step 5: Solve for x
    x = 70,148,996,094.57/345,633.28
  6. Step 6: Final answer
    x = 202,957.88

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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.