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Finding the Fourth Proportional to 297.60, 417.60 and 297.60

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Solution

The fourth proportional to 297.60, 417.60 and 297.60 is: 417.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    297.60 : 417.60 = 297.60 : x
  2. Step 2: Convert to fraction form
    297.60/417.60 = 297.60/x
  3. Step 3: Cross multiply
    297.60x = 417.60 × 297.60
  4. Step 4: Simplify right side
    297.60x = 124,277.76
  5. Step 5: Solve for x
    x = 124,277.76/297.60
  6. Step 6: Final answer
    x = 417.60

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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.