Home / 1,309.17-1,962.51-486.88

Finding the Fourth Proportional to 1,309.17, 1,962.51 and 486.88

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Solution

The fourth proportional to 1,309.17, 1,962.51 and 486.88 is: 729.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,309.17 : 1,962.51 = 486.88 : x
  2. Step 2: Convert to fraction form
    1,309.17/1,962.51 = 486.88/x
  3. Step 3: Cross multiply
    1,309.17x = 1,962.51 × 486.88
  4. Step 4: Simplify right side
    1,309.17x = 955,506.87
  5. Step 5: Solve for x
    x = 955,506.87/1,309.17
  6. Step 6: Final answer
    x = 729.86

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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.