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Finding the Fourth Proportional to 1,292.81, 1,939.21 and 562.30

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Solution

The fourth proportional to 1,292.81, 1,939.21 and 562.30 is: 843.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,292.81 : 1,939.21 = 562.30 : x
  2. Step 2: Convert to fraction form
    1,292.81/1,939.21 = 562.30/x
  3. Step 3: Cross multiply
    1,292.81x = 1,939.21 × 562.30
  4. Step 4: Simplify right side
    1,292.81x = 1,090,411.53
  5. Step 5: Solve for x
    x = 1,090,411.53/1,292.81
  6. Step 6: Final answer
    x = 843.45

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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.