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Finding the Fourth Proportional to 245.76, 339.12 and 152.48

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Solution

The fourth proportional to 245.76, 339.12 and 152.48 is: 210.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    245.76 : 339.12 = 152.48 : x
  2. Step 2: Convert to fraction form
    245.76/339.12 = 152.48/x
  3. Step 3: Cross multiply
    245.76x = 339.12 × 152.48
  4. Step 4: Simplify right side
    245.76x = 51,709.02
  5. Step 5: Solve for x
    x = 51,709.02/245.76
  6. Step 6: Final answer
    x = 210.40

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.