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Finding the Fourth Proportional to 315.58, 472.13 and 207.58

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Solution

The fourth proportional to 315.58, 472.13 and 207.58 is: 310.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    315.58 : 472.13 = 207.58 : x
  2. Step 2: Convert to fraction form
    315.58/472.13 = 207.58/x
  3. Step 3: Cross multiply
    315.58x = 472.13 × 207.58
  4. Step 4: Simplify right side
    315.58x = 98,001.35
  5. Step 5: Solve for x
    x = 98,001.35/315.58
  6. Step 6: Final answer
    x = 310.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.