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Finding the Fourth Proportional to 552.40, 772.40 and 552.40

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Solution

The fourth proportional to 552.40, 772.40 and 552.40 is: 772.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    552.40 : 772.40 = 552.40 : x
  2. Step 2: Convert to fraction form
    552.40/772.40 = 552.40/x
  3. Step 3: Cross multiply
    552.40x = 772.40 × 552.40
  4. Step 4: Simplify right side
    552.40x = 426,673.76
  5. Step 5: Solve for x
    x = 426,673.76/552.40
  6. Step 6: Final answer
    x = 772.40

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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.