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Finding the Fourth Proportional to 808.41, 1,116.12 and 631.06

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Solution

The fourth proportional to 808.41, 1,116.12 and 631.06 is: 871.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    808.41 : 1,116.12 = 631.06 : x
  2. Step 2: Convert to fraction form
    808.41/1,116.12 = 631.06/x
  3. Step 3: Cross multiply
    808.41x = 1,116.12 × 631.06
  4. Step 4: Simplify right side
    808.41x = 704,342.45
  5. Step 5: Solve for x
    x = 704,342.45/808.41
  6. Step 6: Final answer
    x = 871.27

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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.