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Finding the Fourth Proportional to 790.26, 1,090.95 and 535.20

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Solution

The fourth proportional to 790.26, 1,090.95 and 535.20 is: 738.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    790.26 : 1,090.95 = 535.20 : x
  2. Step 2: Convert to fraction form
    790.26/1,090.95 = 535.20/x
  3. Step 3: Cross multiply
    790.26x = 1,090.95 × 535.20
  4. Step 4: Simplify right side
    790.26x = 583,876.44
  5. Step 5: Solve for x
    x = 583,876.44/790.26
  6. Step 6: Final answer
    x = 738.84

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Double scale
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1.5x scale

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.