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Finding the Fourth Proportional to 877.75, 1,316.63 and 228.49

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Solution

The fourth proportional to 877.75, 1,316.63 and 228.49 is: 342.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    877.75 : 1,316.63 = 228.49 : x
  2. Step 2: Convert to fraction form
    877.75/1,316.63 = 228.49/x
  3. Step 3: Cross multiply
    877.75x = 1,316.63 × 228.49
  4. Step 4: Simplify right side
    877.75x = 300,834.07
  5. Step 5: Solve for x
    x = 300,834.07/877.75
  6. Step 6: Final answer
    x = 342.73

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1.5x scale

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.