Home / 1,315.77-1,974.87-666.96

Finding the Fourth Proportional to 1,315.77, 1,974.87 and 666.96

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Solution

The fourth proportional to 1,315.77, 1,974.87 and 666.96 is: 1,001.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,315.77 : 1,974.87 = 666.96 : x
  2. Step 2: Convert to fraction form
    1,315.77/1,974.87 = 666.96/x
  3. Step 3: Cross multiply
    1,315.77x = 1,974.87 × 666.96
  4. Step 4: Simplify right side
    1,315.77x = 1,317,159.30
  5. Step 5: Solve for x
    x = 1,317,159.30/1,315.77
  6. Step 6: Final answer
    x = 1,001.06

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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.