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Finding the Fourth Proportional to 908.32, 1,246.76 and 859.72

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Solution

The fourth proportional to 908.32, 1,246.76 and 859.72 is: 1,180.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    908.32 : 1,246.76 = 859.72 : x
  2. Step 2: Convert to fraction form
    908.32/1,246.76 = 859.72/x
  3. Step 3: Cross multiply
    908.32x = 1,246.76 × 859.72
  4. Step 4: Simplify right side
    908.32x = 1,071,864.51
  5. Step 5: Solve for x
    x = 1,071,864.51/908.32
  6. Step 6: Final answer
    x = 1,180.05

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.