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Finding the Fourth Proportional to 828.92, 1,144.10 and 497.67

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Solution

The fourth proportional to 828.92, 1,144.10 and 497.67 is: 686.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    828.92 : 1,144.10 = 497.67 : x
  2. Step 2: Convert to fraction form
    828.92/1,144.10 = 497.67/x
  3. Step 3: Cross multiply
    828.92x = 1,144.10 × 497.67
  4. Step 4: Simplify right side
    828.92x = 569,381.76
  5. Step 5: Solve for x
    x = 569,381.76/828.92
  6. Step 6: Final answer
    x = 686.90

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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.