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Finding the Fourth Proportional to 790.95, 1,180.72 and 755.45

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Solution

The fourth proportional to 790.95, 1,180.72 and 755.45 is: 1,127.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    790.95 : 1,180.72 = 755.45 : x
  2. Step 2: Convert to fraction form
    790.95/1,180.72 = 755.45/x
  3. Step 3: Cross multiply
    790.95x = 1,180.72 × 755.45
  4. Step 4: Simplify right side
    790.95x = 891,974.92
  5. Step 5: Solve for x
    x = 891,974.92/790.95
  6. Step 6: Final answer
    x = 1,127.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.