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Finding the Fourth Proportional to 315.61, 435.53 and 191.25

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Solution

The fourth proportional to 315.61, 435.53 and 191.25 is: 263.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    315.61 : 435.53 = 191.25 : x
  2. Step 2: Convert to fraction form
    315.61/435.53 = 191.25/x
  3. Step 3: Cross multiply
    315.61x = 435.53 × 191.25
  4. Step 4: Simplify right side
    315.61x = 83,295.11
  5. Step 5: Solve for x
    x = 83,295.11/315.61
  6. Step 6: Final answer
    x = 263.92

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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.