Home / 1,125.30-1,685.93-1,057.53

Finding the Fourth Proportional to 1,125.30, 1,685.93 and 1,057.53

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Solution

The fourth proportional to 1,125.30, 1,685.93 and 1,057.53 is: 1,584.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,125.30 : 1,685.93 = 1,057.53 : x
  2. Step 2: Convert to fraction form
    1,125.30/1,685.93 = 1,057.53/x
  3. Step 3: Cross multiply
    1,125.30x = 1,685.93 × 1,057.53
  4. Step 4: Simplify right side
    1,125.30x = 1,782,916.27
  5. Step 5: Solve for x
    x = 1,782,916.27/1,125.30
  6. Step 6: Final answer
    x = 1,584.39

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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.