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Finding the Fourth Proportional to 207.18, 309.12 and 176.40

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Solution

The fourth proportional to 207.18, 309.12 and 176.40 is: 263.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    207.18 : 309.12 = 176.40 : x
  2. Step 2: Convert to fraction form
    207.18/309.12 = 176.40/x
  3. Step 3: Cross multiply
    207.18x = 309.12 × 176.40
  4. Step 4: Simplify right side
    207.18x = 54,528.77
  5. Step 5: Solve for x
    x = 54,528.77/207.18
  6. Step 6: Final answer
    x = 263.20

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.