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Finding the Fourth Proportional to 794.61, 1,191.90 and 355.76

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Solution

The fourth proportional to 794.61, 1,191.90 and 355.76 is: 533.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    794.61 : 1,191.90 = 355.76 : x
  2. Step 2: Convert to fraction form
    794.61/1,191.90 = 355.76/x
  3. Step 3: Cross multiply
    794.61x = 1,191.90 × 355.76
  4. Step 4: Simplify right side
    794.61x = 424,026.47
  5. Step 5: Solve for x
    x = 424,026.47/794.61
  6. Step 6: Final answer
    x = 533.63

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.