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Finding the Fourth Proportional to 937.98, 1,407.23 and 288.81

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Solution

The fourth proportional to 937.98, 1,407.23 and 288.81 is: 433.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    937.98 : 1,407.23 = 288.81 : x
  2. Step 2: Convert to fraction form
    937.98/1,407.23 = 288.81/x
  3. Step 3: Cross multiply
    937.98x = 1,407.23 × 288.81
  4. Step 4: Simplify right side
    937.98x = 406,420.65
  5. Step 5: Solve for x
    x = 406,420.65/937.98
  6. Step 6: Final answer
    x = 433.29

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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.