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Finding the Fourth Proportional to 803.90, 1,109.02 and 554.82

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Solution

The fourth proportional to 803.90, 1,109.02 and 554.82 is: 765.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    803.90 : 1,109.02 = 554.82 : x
  2. Step 2: Convert to fraction form
    803.90/1,109.02 = 554.82/x
  3. Step 3: Cross multiply
    803.90x = 1,109.02 × 554.82
  4. Step 4: Simplify right side
    803.90x = 615,306.48
  5. Step 5: Solve for x
    x = 615,306.48/803.90
  6. Step 6: Final answer
    x = 765.40

Related Problems

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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.