Home / 1,851.65-2,553.28-1,320.49

Finding the Fourth Proportional to 1,851.65, 2,553.28 and 1,320.49

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Solution

The fourth proportional to 1,851.65, 2,553.28 and 1,320.49 is: 1,820.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,851.65 : 2,553.28 = 1,320.49 : x
  2. Step 2: Convert to fraction form
    1,851.65/2,553.28 = 1,320.49/x
  3. Step 3: Cross multiply
    1,851.65x = 2,553.28 × 1,320.49
  4. Step 4: Simplify right side
    1,851.65x = 3,371,580.71
  5. Step 5: Solve for x
    x = 3,371,580.71/1,851.65
  6. Step 6: Final answer
    x = 1,820.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.