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Finding the Fourth Proportional to 529.70, 743.20 and 529.70

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Solution

The fourth proportional to 529.70, 743.20 and 529.70 is: 743.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    529.70 : 743.20 = 529.70 : x
  2. Step 2: Convert to fraction form
    529.70/743.20 = 529.70/x
  3. Step 3: Cross multiply
    529.70x = 743.20 × 529.70
  4. Step 4: Simplify right side
    529.70x = 393,673.04
  5. Step 5: Solve for x
    x = 393,673.04/529.70
  6. Step 6: Final answer
    x = 743.20

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Double scale
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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.