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Finding the Fourth Proportional to 1,576.55, 2,175.57 and 877.88

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Solution

The fourth proportional to 1,576.55, 2,175.57 and 877.88 is: 1,211.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,576.55 : 2,175.57 = 877.88 : x
  2. Step 2: Convert to fraction form
    1,576.55/2,175.57 = 877.88/x
  3. Step 3: Cross multiply
    1,576.55x = 2,175.57 × 877.88
  4. Step 4: Simplify right side
    1,576.55x = 1,909,878.51
  5. Step 5: Solve for x
    x = 1,909,878.51/1,576.55
  6. Step 6: Final answer
    x = 1,211.43

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1.5x scale

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.