Home / 1,780.17-2,670.56-547.55

Finding the Fourth Proportional to 1,780.17, 2,670.56 and 547.55

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Solution

The fourth proportional to 1,780.17, 2,670.56 and 547.55 is: 821.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,780.17 : 2,670.56 = 547.55 : x
  2. Step 2: Convert to fraction form
    1,780.17/2,670.56 = 547.55/x
  3. Step 3: Cross multiply
    1,780.17x = 2,670.56 × 547.55
  4. Step 4: Simplify right side
    1,780.17x = 1,462,271.12
  5. Step 5: Solve for x
    x = 1,462,271.12/1,780.17
  6. Step 6: Final answer
    x = 821.42

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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.