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Finding the Fourth Proportional to 788.60, 1,088.19 and 439.25

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Solution

The fourth proportional to 788.60, 1,088.19 and 439.25 is: 606.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    788.60 : 1,088.19 = 439.25 : x
  2. Step 2: Convert to fraction form
    788.60/1,088.19 = 439.25/x
  3. Step 3: Cross multiply
    788.60x = 1,088.19 × 439.25
  4. Step 4: Simplify right side
    788.60x = 477,987.46
  5. Step 5: Solve for x
    x = 477,987.46/788.60
  6. Step 6: Final answer
    x = 606.12

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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.