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Finding the Fourth Proportional to 803.07, 1,108.17 and 448.92

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Solution

The fourth proportional to 803.07, 1,108.17 and 448.92 is: 619.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    803.07 : 1,108.17 = 448.92 : x
  2. Step 2: Convert to fraction form
    803.07/1,108.17 = 448.92/x
  3. Step 3: Cross multiply
    803.07x = 1,108.17 × 448.92
  4. Step 4: Simplify right side
    803.07x = 497,479.68
  5. Step 5: Solve for x
    x = 497,479.68/803.07
  6. Step 6: Final answer
    x = 619.47

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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.