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Finding the Fourth Proportional to 1,330.92, 1,836.38 and 807.08

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Solution

The fourth proportional to 1,330.92, 1,836.38 and 807.08 is: 1,113.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,330.92 : 1,836.38 = 807.08 : x
  2. Step 2: Convert to fraction form
    1,330.92/1,836.38 = 807.08/x
  3. Step 3: Cross multiply
    1,330.92x = 1,836.38 × 807.08
  4. Step 4: Simplify right side
    1,330.92x = 1,482,105.57
  5. Step 5: Solve for x
    x = 1,482,105.57/1,330.92
  6. Step 6: Final answer
    x = 1,113.59

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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.