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Finding the Fourth Proportional to 809.06, 1,116.55 and 455.01

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Solution

The fourth proportional to 809.06, 1,116.55 and 455.01 is: 627.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    809.06 : 1,116.55 = 455.01 : x
  2. Step 2: Convert to fraction form
    809.06/1,116.55 = 455.01/x
  3. Step 3: Cross multiply
    809.06x = 1,116.55 × 455.01
  4. Step 4: Simplify right side
    809.06x = 508,040.28
  5. Step 5: Solve for x
    x = 508,040.28/809.06
  6. Step 6: Final answer
    x = 627.94

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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.