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Finding the Fourth Proportional to 790.32, 1,090.26 and 528.42

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Solution

The fourth proportional to 790.32, 1,090.26 and 528.42 is: 728.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    790.32 : 1,090.26 = 528.42 : x
  2. Step 2: Convert to fraction form
    790.32/1,090.26 = 528.42/x
  3. Step 3: Cross multiply
    790.32x = 1,090.26 × 528.42
  4. Step 4: Simplify right side
    790.32x = 576,115.19
  5. Step 5: Solve for x
    x = 576,115.19/790.32
  6. Step 6: Final answer
    x = 728.96

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Double scale
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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.