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Finding the Fourth Proportional to 425.01, 633.78 and 391.35

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Solution

The fourth proportional to 425.01, 633.78 and 391.35 is: 583.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    425.01 : 633.78 = 391.35 : x
  2. Step 2: Convert to fraction form
    425.01/633.78 = 391.35/x
  3. Step 3: Cross multiply
    425.01x = 633.78 × 391.35
  4. Step 4: Simplify right side
    425.01x = 248,032.18
  5. Step 5: Solve for x
    x = 248,032.18/425.01
  6. Step 6: Final answer
    x = 583.59

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.