Home / 1,008.60-1,392.03-942.72

Finding the Fourth Proportional to 1,008.60, 1,392.03 and 942.72

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Solution

The fourth proportional to 1,008.60, 1,392.03 and 942.72 is: 1,301.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,008.60 : 1,392.03 = 942.72 : x
  2. Step 2: Convert to fraction form
    1,008.60/1,392.03 = 942.72/x
  3. Step 3: Cross multiply
    1,008.60x = 1,392.03 × 942.72
  4. Step 4: Simplify right side
    1,008.60x = 1,312,294.52
  5. Step 5: Solve for x
    x = 1,312,294.52/1,008.60
  6. Step 6: Final answer
    x = 1,301.11

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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.