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Finding the Fourth Proportional to 489.07, 734 and 258.10

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Solution

The fourth proportional to 489.07, 734 and 258.10 is: 387.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.07 : 734 = 258.10 : x
  2. Step 2: Convert to fraction form
    489.07/734 = 258.10/x
  3. Step 3: Cross multiply
    489.07x = 734 × 258.10
  4. Step 4: Simplify right side
    489.07x = 189,445.40
  5. Step 5: Solve for x
    x = 189,445.40/489.07
  6. Step 6: Final answer
    x = 387.36

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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.