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Finding the Fourth Proportional to 910.17, 1,366.47 and 520.56

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Solution

The fourth proportional to 910.17, 1,366.47 and 520.56 is: 781.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    910.17 : 1,366.47 = 520.56 : x
  2. Step 2: Convert to fraction form
    910.17/1,366.47 = 520.56/x
  3. Step 3: Cross multiply
    910.17x = 1,366.47 × 520.56
  4. Step 4: Simplify right side
    910.17x = 711,329.62
  5. Step 5: Solve for x
    x = 711,329.62/910.17
  6. Step 6: Final answer
    x = 781.53

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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.