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Finding the Fourth Proportional to 283.65, 424.40 and 187.65

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Solution

The fourth proportional to 283.65, 424.40 and 187.65 is: 280.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    283.65 : 424.40 = 187.65 : x
  2. Step 2: Convert to fraction form
    283.65/424.40 = 187.65/x
  3. Step 3: Cross multiply
    283.65x = 424.40 × 187.65
  4. Step 4: Simplify right side
    283.65x = 79,637.72
  5. Step 5: Solve for x
    x = 79,637.72/283.65
  6. Step 6: Final answer
    x = 280.76

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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.