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Finding the Fourth Proportional to 1,569.68, 2,351.28 and 918.44

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Solution

The fourth proportional to 1,569.68, 2,351.28 and 918.44 is: 1,375.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,569.68 : 2,351.28 = 918.44 : x
  2. Step 2: Convert to fraction form
    1,569.68/2,351.28 = 918.44/x
  3. Step 3: Cross multiply
    1,569.68x = 2,351.28 × 918.44
  4. Step 4: Simplify right side
    1,569.68x = 2,159,509.60
  5. Step 5: Solve for x
    x = 2,159,509.60/1,569.68
  6. Step 6: Final answer
    x = 1,375.76

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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.