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Finding the Fourth Proportional to 809.76, 1,117.22 and 460.38

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Solution

The fourth proportional to 809.76, 1,117.22 and 460.38 is: 635.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    809.76 : 1,117.22 = 460.38 : x
  2. Step 2: Convert to fraction form
    809.76/1,117.22 = 460.38/x
  3. Step 3: Cross multiply
    809.76x = 1,117.22 × 460.38
  4. Step 4: Simplify right side
    809.76x = 514,343.44
  5. Step 5: Solve for x
    x = 514,343.44/809.76
  6. Step 6: Final answer
    x = 635.18

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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.