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Finding the Fourth Proportional to 412.13, 569.01 and 318.71

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Solution

The fourth proportional to 412.13, 569.01 and 318.71 is: 440.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    412.13 : 569.01 = 318.71 : x
  2. Step 2: Convert to fraction form
    412.13/569.01 = 318.71/x
  3. Step 3: Cross multiply
    412.13x = 569.01 × 318.71
  4. Step 4: Simplify right side
    412.13x = 181,349.18
  5. Step 5: Solve for x
    x = 181,349.18/412.13
  6. Step 6: Final answer
    x = 440.03

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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.