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Finding the Fourth Proportional to 809.07, 1,116.51 and 459.82

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Solution

The fourth proportional to 809.07, 1,116.51 and 459.82 is: 634.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    809.07 : 1,116.51 = 459.82 : x
  2. Step 2: Convert to fraction form
    809.07/1,116.51 = 459.82/x
  3. Step 3: Cross multiply
    809.07x = 1,116.51 × 459.82
  4. Step 4: Simplify right side
    809.07x = 513,393.63
  5. Step 5: Solve for x
    x = 513,393.63/809.07
  6. Step 6: Final answer
    x = 634.55

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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.