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Finding the Fourth Proportional to 790.60, 1,091.52 and 511.33

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Solution

The fourth proportional to 790.60, 1,091.52 and 511.33 is: 705.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    790.60 : 1,091.52 = 511.33 : x
  2. Step 2: Convert to fraction form
    790.60/1,091.52 = 511.33/x
  3. Step 3: Cross multiply
    790.60x = 1,091.52 × 511.33
  4. Step 4: Simplify right side
    790.60x = 558,126.92
  5. Step 5: Solve for x
    x = 558,126.92/790.60
  6. Step 6: Final answer
    x = 705.95

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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.