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Finding the Fourth Proportional to 804.80, 1,111.12 and 525.52

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Solution

The fourth proportional to 804.80, 1,111.12 and 525.52 is: 725.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    804.80 : 1,111.12 = 525.52 : x
  2. Step 2: Convert to fraction form
    804.80/1,111.12 = 525.52/x
  3. Step 3: Cross multiply
    804.80x = 1,111.12 × 525.52
  4. Step 4: Simplify right side
    804.80x = 583,915.78
  5. Step 5: Solve for x
    x = 583,915.78/804.80
  6. Step 6: Final answer
    x = 725.54

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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.