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Finding the Fourth Proportional to 555.01, 831.78 and 307.85

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Solution

The fourth proportional to 555.01, 831.78 and 307.85 is: 461.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.01 : 831.78 = 307.85 : x
  2. Step 2: Convert to fraction form
    555.01/831.78 = 307.85/x
  3. Step 3: Cross multiply
    555.01x = 831.78 × 307.85
  4. Step 4: Simplify right side
    555.01x = 256,059.31
  5. Step 5: Solve for x
    x = 256,059.31/555.01
  6. Step 6: Final answer
    x = 461.36

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Double scale
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Similar ratio
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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.