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Finding the Fourth Proportional to 877.89, 1,211.52 and 504.88

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Solution

The fourth proportional to 877.89, 1,211.52 and 504.88 is: 696.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    877.89 : 1,211.52 = 504.88 : x
  2. Step 2: Convert to fraction form
    877.89/1,211.52 = 504.88/x
  3. Step 3: Cross multiply
    877.89x = 1,211.52 × 504.88
  4. Step 4: Simplify right side
    877.89x = 611,672.22
  5. Step 5: Solve for x
    x = 611,672.22/877.89
  6. Step 6: Final answer
    x = 696.75

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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.