Home / 1,438.74-1,985.49-1,124.37

Finding the Fourth Proportional to 1,438.74, 1,985.49 and 1,124.37

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Solution

The fourth proportional to 1,438.74, 1,985.49 and 1,124.37 is: 1,551.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,438.74 : 1,985.49 = 1,124.37 : x
  2. Step 2: Convert to fraction form
    1,438.74/1,985.49 = 1,124.37/x
  3. Step 3: Cross multiply
    1,438.74x = 1,985.49 × 1,124.37
  4. Step 4: Simplify right side
    1,438.74x = 2,232,425.39
  5. Step 5: Solve for x
    x = 2,232,425.39/1,438.74
  6. Step 6: Final answer
    x = 1,551.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.