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Finding the Fourth Proportional to 908.52, 1,253.08 and 711.64

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Solution

The fourth proportional to 908.52, 1,253.08 and 711.64 is: 981.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    908.52 : 1,253.08 = 711.64 : x
  2. Step 2: Convert to fraction form
    908.52/1,253.08 = 711.64/x
  3. Step 3: Cross multiply
    908.52x = 1,253.08 × 711.64
  4. Step 4: Simplify right side
    908.52x = 891,741.85
  5. Step 5: Solve for x
    x = 891,741.85/908.52
  6. Step 6: Final answer
    x = 981.53

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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.