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Finding the Fourth Proportional to 432.78, 597.30 and 258.18

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Solution

The fourth proportional to 432.78, 597.30 and 258.18 is: 356.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    432.78 : 597.30 = 258.18 : x
  2. Step 2: Convert to fraction form
    432.78/597.30 = 258.18/x
  3. Step 3: Cross multiply
    432.78x = 597.30 × 258.18
  4. Step 4: Simplify right side
    432.78x = 154,210.91
  5. Step 5: Solve for x
    x = 154,210.91/432.78
  6. Step 6: Final answer
    x = 356.33

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.