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Finding the Fourth Proportional to 554.01, 831.31 and 280.10

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Solution

The fourth proportional to 554.01, 831.31 and 280.10 is: 420.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.01 : 831.31 = 280.10 : x
  2. Step 2: Convert to fraction form
    554.01/831.31 = 280.10/x
  3. Step 3: Cross multiply
    554.01x = 831.31 × 280.10
  4. Step 4: Simplify right side
    554.01x = 232,849.93
  5. Step 5: Solve for x
    x = 232,849.93/554.01
  6. Step 6: Final answer
    x = 420.30

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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.