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Finding the Fourth Proportional to 808.39, 1,115.67 and 454.37

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Solution

The fourth proportional to 808.39, 1,115.67 and 454.37 is: 627.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    808.39 : 1,115.67 = 454.37 : x
  2. Step 2: Convert to fraction form
    808.39/1,115.67 = 454.37/x
  3. Step 3: Cross multiply
    808.39x = 1,115.67 × 454.37
  4. Step 4: Simplify right side
    808.39x = 506,926.98
  5. Step 5: Solve for x
    x = 506,926.98/808.39
  6. Step 6: Final answer
    x = 627.08

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1.5x scale

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.