Home / 1,309.46-1,962.59-615.20

Finding the Fourth Proportional to 1,309.46, 1,962.59 and 615.20

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Solution

The fourth proportional to 1,309.46, 1,962.59 and 615.20 is: 922.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,309.46 : 1,962.59 = 615.20 : x
  2. Step 2: Convert to fraction form
    1,309.46/1,962.59 = 615.20/x
  3. Step 3: Cross multiply
    1,309.46x = 1,962.59 × 615.20
  4. Step 4: Simplify right side
    1,309.46x = 1,207,387.20
  5. Step 5: Solve for x
    x = 1,207,387.20/1,309.46
  6. Step 6: Final answer
    x = 922.05

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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.