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Finding the Fourth Proportional to 802.96, 1,108.11 and 448.87

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Solution

The fourth proportional to 802.96, 1,108.11 and 448.87 is: 619.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    802.96 : 1,108.11 = 448.87 : x
  2. Step 2: Convert to fraction form
    802.96/1,108.11 = 448.87/x
  3. Step 3: Cross multiply
    802.96x = 1,108.11 × 448.87
  4. Step 4: Simplify right side
    802.96x = 497,393.44
  5. Step 5: Solve for x
    x = 497,393.44/802.96
  6. Step 6: Final answer
    x = 619.45

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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.