Home / 1,215.32-1,823.88-666.94

Finding the Fourth Proportional to 1,215.32, 1,823.88 and 666.94

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Solution

The fourth proportional to 1,215.32, 1,823.88 and 666.94 is: 1,000.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,215.32 : 1,823.88 = 666.94 : x
  2. Step 2: Convert to fraction form
    1,215.32/1,823.88 = 666.94/x
  3. Step 3: Cross multiply
    1,215.32x = 1,823.88 × 666.94
  4. Step 4: Simplify right side
    1,215.32x = 1,216,418.53
  5. Step 5: Solve for x
    x = 1,216,418.53/1,215.32
  6. Step 6: Final answer
    x = 1,000.90

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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.