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Finding the Fourth Proportional to 497.46, 747.81 and 390.54

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Solution

The fourth proportional to 497.46, 747.81 and 390.54 is: 587.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    497.46 : 747.81 = 390.54 : x
  2. Step 2: Convert to fraction form
    497.46/747.81 = 390.54/x
  3. Step 3: Cross multiply
    497.46x = 747.81 × 390.54
  4. Step 4: Simplify right side
    497.46x = 292,049.72
  5. Step 5: Solve for x
    x = 292,049.72/497.46
  6. Step 6: Final answer
    x = 587.08

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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.