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Finding the Fourth Proportional to 1,372.65, 2,055.72 and 877.53

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Solution

The fourth proportional to 1,372.65, 2,055.72 and 877.53 is: 1,314.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,372.65 : 2,055.72 = 877.53 : x
  2. Step 2: Convert to fraction form
    1,372.65/2,055.72 = 877.53/x
  3. Step 3: Cross multiply
    1,372.65x = 2,055.72 × 877.53
  4. Step 4: Simplify right side
    1,372.65x = 1,803,955.97
  5. Step 5: Solve for x
    x = 1,803,955.97/1,372.65
  6. Step 6: Final answer
    x = 1,314.21

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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.