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Finding the Fourth Proportional to 1,316.06, 1,815.90 and 792.12

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Solution

The fourth proportional to 1,316.06, 1,815.90 and 792.12 is: 1,092.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,316.06 : 1,815.90 = 792.12 : x
  2. Step 2: Convert to fraction form
    1,316.06/1,815.90 = 792.12/x
  3. Step 3: Cross multiply
    1,316.06x = 1,815.90 × 792.12
  4. Step 4: Simplify right side
    1,316.06x = 1,438,410.71
  5. Step 5: Solve for x
    x = 1,438,410.71/1,316.06
  6. Step 6: Final answer
    x = 1,092.97

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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.