Home / 1,320.51-1,979.28-1,013.66

Finding the Fourth Proportional to 1,320.51, 1,979.28 and 1,013.66

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Solution

The fourth proportional to 1,320.51, 1,979.28 and 1,013.66 is: 1,519.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320.51 : 1,979.28 = 1,013.66 : x
  2. Step 2: Convert to fraction form
    1,320.51/1,979.28 = 1,013.66/x
  3. Step 3: Cross multiply
    1,320.51x = 1,979.28 × 1,013.66
  4. Step 4: Simplify right side
    1,320.51x = 2,006,316.96
  5. Step 5: Solve for x
    x = 2,006,316.96/1,320.51
  6. Step 6: Final answer
    x = 1,519.35

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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.