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Finding the Fourth Proportional to 807.29, 1,113.99 and 448.39

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Solution

The fourth proportional to 807.29, 1,113.99 and 448.39 is: 618.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    807.29 : 1,113.99 = 448.39 : x
  2. Step 2: Convert to fraction form
    807.29/1,113.99 = 448.39/x
  3. Step 3: Cross multiply
    807.29x = 1,113.99 × 448.39
  4. Step 4: Simplify right side
    807.29x = 499,503.37
  5. Step 5: Solve for x
    x = 499,503.37/807.29
  6. Step 6: Final answer
    x = 618.74

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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.