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Finding the Fourth Proportional to 805.44, 1,111.30 and 473.75

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Solution

The fourth proportional to 805.44, 1,111.30 and 473.75 is: 653.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    805.44 : 1,111.30 = 473.75 : x
  2. Step 2: Convert to fraction form
    805.44/1,111.30 = 473.75/x
  3. Step 3: Cross multiply
    805.44x = 1,111.30 × 473.75
  4. Step 4: Simplify right side
    805.44x = 526,478.38
  5. Step 5: Solve for x
    x = 526,478.38/805.44
  6. Step 6: Final answer
    x = 653.65

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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.