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Finding the Fourth Proportional to 465.13, 641.73 and 278.65

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Solution

The fourth proportional to 465.13, 641.73 and 278.65 is: 384.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    465.13 : 641.73 = 278.65 : x
  2. Step 2: Convert to fraction form
    465.13/641.73 = 278.65/x
  3. Step 3: Cross multiply
    465.13x = 641.73 × 278.65
  4. Step 4: Simplify right side
    465.13x = 178,818.06
  5. Step 5: Solve for x
    x = 178,818.06/465.13
  6. Step 6: Final answer
    x = 384.45

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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.