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Finding the Fourth Proportional to 788.86, 1,088.42 and 457.30

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Solution

The fourth proportional to 788.86, 1,088.42 and 457.30 is: 630.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    788.86 : 1,088.42 = 457.30 : x
  2. Step 2: Convert to fraction form
    788.86/1,088.42 = 457.30/x
  3. Step 3: Cross multiply
    788.86x = 1,088.42 × 457.30
  4. Step 4: Simplify right side
    788.86x = 497,734.47
  5. Step 5: Solve for x
    x = 497,734.47/788.86
  6. Step 6: Final answer
    x = 630.95

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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.