Home / 260,340.57-390,519.45-89,560.58

Finding the Fourth Proportional to 260,340.57, 390,519.45 and 89,560.58

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Solution

The fourth proportional to 260,340.57, 390,519.45 and 89,560.58 is: 134,343.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,340.57 : 390,519.45 = 89,560.58 : x
  2. Step 2: Convert to fraction form
    260,340.57/390,519.45 = 89,560.58/x
  3. Step 3: Cross multiply
    260,340.57x = 390,519.45 × 89,560.58
  4. Step 4: Simplify right side
    260,340.57x = 34,975,146,490.68
  5. Step 5: Solve for x
    x = 34,975,146,490.68/260,340.57
  6. Step 6: Final answer
    x = 134,343.82

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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.