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Finding the Fourth Proportional to 506.20, 709.40 and 506.20

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Solution

The fourth proportional to 506.20, 709.40 and 506.20 is: 709.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    506.20 : 709.40 = 506.20 : x
  2. Step 2: Convert to fraction form
    506.20/709.40 = 506.20/x
  3. Step 3: Cross multiply
    506.20x = 709.40 × 506.20
  4. Step 4: Simplify right side
    506.20x = 359,098.28
  5. Step 5: Solve for x
    x = 359,098.28/506.20
  6. Step 6: Final answer
    x = 709.40

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Double scale
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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.