Home / 1,309.98-1,962.36-615.70

Finding the Fourth Proportional to 1,309.98, 1,962.36 and 615.70

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Solution

The fourth proportional to 1,309.98, 1,962.36 and 615.70 is: 922.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,309.98 : 1,962.36 = 615.70 : x
  2. Step 2: Convert to fraction form
    1,309.98/1,962.36 = 615.70/x
  3. Step 3: Cross multiply
    1,309.98x = 1,962.36 × 615.70
  4. Step 4: Simplify right side
    1,309.98x = 1,208,225.05
  5. Step 5: Solve for x
    x = 1,208,225.05/1,309.98
  6. Step 6: Final answer
    x = 922.32

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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.