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Finding the Fourth Proportional to 1,530.92, 2,112.90 and 1,008.02

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Solution

The fourth proportional to 1,530.92, 2,112.90 and 1,008.02 is: 1,391.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,530.92 : 2,112.90 = 1,008.02 : x
  2. Step 2: Convert to fraction form
    1,530.92/2,112.90 = 1,008.02/x
  3. Step 3: Cross multiply
    1,530.92x = 2,112.90 × 1,008.02
  4. Step 4: Simplify right side
    1,530.92x = 2,129,845.46
  5. Step 5: Solve for x
    x = 2,129,845.46/1,530.92
  6. Step 6: Final answer
    x = 1,391.22

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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.