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Finding the Fourth Proportional to 554.30, 831.78 and 207.58

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Solution

The fourth proportional to 554.30, 831.78 and 207.58 is: 311.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.30 : 831.78 = 207.58 : x
  2. Step 2: Convert to fraction form
    554.30/831.78 = 207.58/x
  3. Step 3: Cross multiply
    554.30x = 831.78 × 207.58
  4. Step 4: Simplify right side
    554.30x = 172,660.89
  5. Step 5: Solve for x
    x = 172,660.89/554.30
  6. Step 6: Final answer
    x = 311.49

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Double scale
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Similar ratio
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1.5x scale

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.