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Finding the Fourth Proportional to 315.51, 473.00 and 123.09

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Solution

The fourth proportional to 315.51, 473.00 and 123.09 is: 184.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    315.51 : 473.00 = 123.09 : x
  2. Step 2: Convert to fraction form
    315.51/473.00 = 123.09/x
  3. Step 3: Cross multiply
    315.51x = 473.00 × 123.09
  4. Step 4: Simplify right side
    315.51x = 58,220.95
  5. Step 5: Solve for x
    x = 58,220.95/315.51
  6. Step 6: Final answer
    x = 184.53

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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.