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Finding the Fourth Proportional to 1,109.93, 1,665.20 and 524.90

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Solution

The fourth proportional to 1,109.93, 1,665.20 and 524.90 is: 787.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,109.93 : 1,665.20 = 524.90 : x
  2. Step 2: Convert to fraction form
    1,109.93/1,665.20 = 524.90/x
  3. Step 3: Cross multiply
    1,109.93x = 1,665.20 × 524.90
  4. Step 4: Simplify right side
    1,109.93x = 874,063.48
  5. Step 5: Solve for x
    x = 874,063.48/1,109.93
  6. Step 6: Final answer
    x = 787.49

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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.