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Finding the Fourth Proportional to 877.56, 1,211.30 and 523.74

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Solution

The fourth proportional to 877.56, 1,211.30 and 523.74 is: 722.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    877.56 : 1,211.30 = 523.74 : x
  2. Step 2: Convert to fraction form
    877.56/1,211.30 = 523.74/x
  3. Step 3: Cross multiply
    877.56x = 1,211.30 × 523.74
  4. Step 4: Simplify right side
    877.56x = 634,403.64
  5. Step 5: Solve for x
    x = 634,403.64/877.56
  6. Step 6: Final answer
    x = 722.92

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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.