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Finding the Fourth Proportional to 788.75, 1,088.48 and 439.44

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Solution

The fourth proportional to 788.75, 1,088.48 and 439.44 is: 606.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    788.75 : 1,088.48 = 439.44 : x
  2. Step 2: Convert to fraction form
    788.75/1,088.48 = 439.44/x
  3. Step 3: Cross multiply
    788.75x = 1,088.48 × 439.44
  4. Step 4: Simplify right side
    788.75x = 478,321.65
  5. Step 5: Solve for x
    x = 478,321.65/788.75
  6. Step 6: Final answer
    x = 606.43

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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.