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Finding the Fourth Proportional to 877.56, 1,316.78 and 531.60

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Solution

The fourth proportional to 877.56, 1,316.78 and 531.60 is: 797.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    877.56 : 1,316.78 = 531.60 : x
  2. Step 2: Convert to fraction form
    877.56/1,316.78 = 531.60/x
  3. Step 3: Cross multiply
    877.56x = 1,316.78 × 531.60
  4. Step 4: Simplify right side
    877.56x = 700,000.25
  5. Step 5: Solve for x
    x = 700,000.25/877.56
  6. Step 6: Final answer
    x = 797.67

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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.