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Finding the Fourth Proportional to 1,124.16, 1,684.80 and 800.16

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Solution

The fourth proportional to 1,124.16, 1,684.80 and 800.16 is: 1,199.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,124.16 : 1,684.80 = 800.16 : x
  2. Step 2: Convert to fraction form
    1,124.16/1,684.80 = 800.16/x
  3. Step 3: Cross multiply
    1,124.16x = 1,684.80 × 800.16
  4. Step 4: Simplify right side
    1,124.16x = 1,348,109.57
  5. Step 5: Solve for x
    x = 1,348,109.57/1,124.16
  6. Step 6: Final answer
    x = 1,199.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.