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Finding the Fourth Proportional to 803.34, 1,108.65 and 554.77

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Solution

The fourth proportional to 803.34, 1,108.65 and 554.77 is: 765.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    803.34 : 1,108.65 = 554.77 : x
  2. Step 2: Convert to fraction form
    803.34/1,108.65 = 554.77/x
  3. Step 3: Cross multiply
    803.34x = 1,108.65 × 554.77
  4. Step 4: Simplify right side
    803.34x = 615,049.23
  5. Step 5: Solve for x
    x = 615,049.23/803.34
  6. Step 6: Final answer
    x = 765.62

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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.