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Finding the Fourth Proportional to 788.95, 1,088.79 and 457.39

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Solution

The fourth proportional to 788.95, 1,088.79 and 457.39 is: 631.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    788.95 : 1,088.79 = 457.39 : x
  2. Step 2: Convert to fraction form
    788.95/1,088.79 = 457.39/x
  3. Step 3: Cross multiply
    788.95x = 1,088.79 × 457.39
  4. Step 4: Simplify right side
    788.95x = 498,001.66
  5. Step 5: Solve for x
    x = 498,001.66/788.95
  6. Step 6: Final answer
    x = 631.22

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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.