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Finding the Fourth Proportional to 805.06, 1,110.95 and 455.76

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Solution

The fourth proportional to 805.06, 1,110.95 and 455.76 is: 628.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    805.06 : 1,110.95 = 455.76 : x
  2. Step 2: Convert to fraction form
    805.06/1,110.95 = 455.76/x
  3. Step 3: Cross multiply
    805.06x = 1,110.95 × 455.76
  4. Step 4: Simplify right side
    805.06x = 506,321.02
  5. Step 5: Solve for x
    x = 506,321.02/805.06
  6. Step 6: Final answer
    x = 628.92

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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.