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Finding the Fourth Proportional to 802.15, 1,106.99 and 448.05

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Solution

The fourth proportional to 802.15, 1,106.99 and 448.05 is: 618.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    802.15 : 1,106.99 = 448.05 : x
  2. Step 2: Convert to fraction form
    802.15/1,106.99 = 448.05/x
  3. Step 3: Cross multiply
    802.15x = 1,106.99 × 448.05
  4. Step 4: Simplify right side
    802.15x = 495,988.78
  5. Step 5: Solve for x
    x = 495,988.78/802.15
  6. Step 6: Final answer
    x = 618.33

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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.