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Finding the Fourth Proportional to 803.32, 1,109.09 and 656.30

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Solution

The fourth proportional to 803.32, 1,109.09 and 656.30 is: 906.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    803.32 : 1,109.09 = 656.30 : x
  2. Step 2: Convert to fraction form
    803.32/1,109.09 = 656.30/x
  3. Step 3: Cross multiply
    803.32x = 1,109.09 × 656.30
  4. Step 4: Simplify right side
    803.32x = 727,895.77
  5. Step 5: Solve for x
    x = 727,895.77/803.32
  6. Step 6: Final answer
    x = 906.11

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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.