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Finding the Fourth Proportional to 315.18, 434.52 and 235.35

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Solution

The fourth proportional to 315.18, 434.52 and 235.35 is: 324.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    315.18 : 434.52 = 235.35 : x
  2. Step 2: Convert to fraction form
    315.18/434.52 = 235.35/x
  3. Step 3: Cross multiply
    315.18x = 434.52 × 235.35
  4. Step 4: Simplify right side
    315.18x = 102,264.28
  5. Step 5: Solve for x
    x = 102,264.28/315.18
  6. Step 6: Final answer
    x = 324.46

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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.