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Finding the Fourth Proportional to 824.70, 1,156.20 and 824.70

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Solution

The fourth proportional to 824.70, 1,156.20 and 824.70 is: 1,156.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    824.70 : 1,156.20 = 824.70 : x
  2. Step 2: Convert to fraction form
    824.70/1,156.20 = 824.70/x
  3. Step 3: Cross multiply
    824.70x = 1,156.20 × 824.70
  4. Step 4: Simplify right side
    824.70x = 953,518.14
  5. Step 5: Solve for x
    x = 953,518.14/824.70
  6. Step 6: Final answer
    x = 1,156.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.