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Finding the Fourth Proportional to 809.08, 1,117.18 and 651.22

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Solution

The fourth proportional to 809.08, 1,117.18 and 651.22 is: 899.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    809.08 : 1,117.18 = 651.22 : x
  2. Step 2: Convert to fraction form
    809.08/1,117.18 = 651.22/x
  3. Step 3: Cross multiply
    809.08x = 1,117.18 × 651.22
  4. Step 4: Simplify right side
    809.08x = 727,523.91
  5. Step 5: Solve for x
    x = 727,523.91/809.08
  6. Step 6: Final answer
    x = 899.20

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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.