Home / 3,115.40-4,672.26-924.20

Finding the Fourth Proportional to 3,115.40, 4,672.26 and 924.20

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Solution

The fourth proportional to 3,115.40, 4,672.26 and 924.20 is: 1,386.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,115.40 : 4,672.26 = 924.20 : x
  2. Step 2: Convert to fraction form
    3,115.40/4,672.26 = 924.20/x
  3. Step 3: Cross multiply
    3,115.40x = 4,672.26 × 924.20
  4. Step 4: Simplify right side
    3,115.40x = 4,318,102.69
  5. Step 5: Solve for x
    x = 4,318,102.69/3,115.40
  6. Step 6: Final answer
    x = 1,386.05

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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.