Home / 1,325.40-1,985.95-700.66

Finding the Fourth Proportional to 1,325.40, 1,985.95 and 700.66

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Solution

The fourth proportional to 1,325.40, 1,985.95 and 700.66 is: 1,049.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,325.40 : 1,985.95 = 700.66 : x
  2. Step 2: Convert to fraction form
    1,325.40/1,985.95 = 700.66/x
  3. Step 3: Cross multiply
    1,325.40x = 1,985.95 × 700.66
  4. Step 4: Simplify right side
    1,325.40x = 1,391,475.14
  5. Step 5: Solve for x
    x = 1,391,475.14/1,325.40
  6. Step 6: Final answer
    x = 1,049.86

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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.