Home / 1,320.13-1,980.11-498.29

Finding the Fourth Proportional to 1,320.13, 1,980.11 and 498.29

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Solution

The fourth proportional to 1,320.13, 1,980.11 and 498.29 is: 747.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320.13 : 1,980.11 = 498.29 : x
  2. Step 2: Convert to fraction form
    1,320.13/1,980.11 = 498.29/x
  3. Step 3: Cross multiply
    1,320.13x = 1,980.11 × 498.29
  4. Step 4: Simplify right side
    1,320.13x = 986,668.39
  5. Step 5: Solve for x
    x = 986,668.39/1,320.13
  6. Step 6: Final answer
    x = 747.41

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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.