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Finding the Fourth Proportional to 790.34, 1,090.52 and 672.76

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Solution

The fourth proportional to 790.34, 1,090.52 and 672.76 is: 928.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    790.34 : 1,090.52 = 672.76 : x
  2. Step 2: Convert to fraction form
    790.34/1,090.52 = 672.76/x
  3. Step 3: Cross multiply
    790.34x = 1,090.52 × 672.76
  4. Step 4: Simplify right side
    790.34x = 733,654.67
  5. Step 5: Solve for x
    x = 733,654.67/790.34
  6. Step 6: Final answer
    x = 928.27

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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.