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Finding the Fourth Proportional to 1,109.84, 1,664.16 and 340.24

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Solution

The fourth proportional to 1,109.84, 1,664.16 and 340.24 is: 510.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,109.84 : 1,664.16 = 340.24 : x
  2. Step 2: Convert to fraction form
    1,109.84/1,664.16 = 340.24/x
  3. Step 3: Cross multiply
    1,109.84x = 1,664.16 × 340.24
  4. Step 4: Simplify right side
    1,109.84x = 566,213.80
  5. Step 5: Solve for x
    x = 566,213.80/1,109.84
  6. Step 6: Final answer
    x = 510.18

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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.