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Finding the Fourth Proportional to 407.17, 561.99 and 232.51

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Solution

The fourth proportional to 407.17, 561.99 and 232.51 is: 320.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    407.17 : 561.99 = 232.51 : x
  2. Step 2: Convert to fraction form
    407.17/561.99 = 232.51/x
  3. Step 3: Cross multiply
    407.17x = 561.99 × 232.51
  4. Step 4: Simplify right side
    407.17x = 130,668.29
  5. Step 5: Solve for x
    x = 130,668.29/407.17
  6. Step 6: Final answer
    x = 320.92

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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.