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Finding the Fourth Proportional to 554.08, 831.12 and 261.49

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Solution

The fourth proportional to 554.08, 831.12 and 261.49 is: 392.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.08 : 831.12 = 261.49 : x
  2. Step 2: Convert to fraction form
    554.08/831.12 = 261.49/x
  3. Step 3: Cross multiply
    554.08x = 831.12 × 261.49
  4. Step 4: Simplify right side
    554.08x = 217,328.47
  5. Step 5: Solve for x
    x = 217,328.47/554.08
  6. Step 6: Final answer
    x = 392.23

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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.