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Finding the Fourth Proportional to 789.24, 1,088.10 and 552.78

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Solution

The fourth proportional to 789.24, 1,088.10 and 552.78 is: 762.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    789.24 : 1,088.10 = 552.78 : x
  2. Step 2: Convert to fraction form
    789.24/1,088.10 = 552.78/x
  3. Step 3: Cross multiply
    789.24x = 1,088.10 × 552.78
  4. Step 4: Simplify right side
    789.24x = 601,479.92
  5. Step 5: Solve for x
    x = 601,479.92/789.24
  6. Step 6: Final answer
    x = 762.10

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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.