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Finding the Fourth Proportional to 1,008.32, 1,518.08 and 790.11

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Solution

The fourth proportional to 1,008.32, 1,518.08 and 790.11 is: 1,189.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,008.32 : 1,518.08 = 790.11 : x
  2. Step 2: Convert to fraction form
    1,008.32/1,518.08 = 790.11/x
  3. Step 3: Cross multiply
    1,008.32x = 1,518.08 × 790.11
  4. Step 4: Simplify right side
    1,008.32x = 1,199,446.24
  5. Step 5: Solve for x
    x = 1,199,446.24/1,008.32
  6. Step 6: Final answer
    x = 1,189.56

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.