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Finding the Fourth Proportional to 315, 434.50 and 183.91

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Solution

The fourth proportional to 315, 434.50 and 183.91 is: 253.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    315 : 434.50 = 183.91 : x
  2. Step 2: Convert to fraction form
    315/434.50 = 183.91/x
  3. Step 3: Cross multiply
    315x = 434.50 × 183.91
  4. Step 4: Simplify right side
    315x = 79,908.90
  5. Step 5: Solve for x
    x = 79,908.90/315
  6. Step 6: Final answer
    x = 253.68

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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.