Home / 1,377.15-2,064.03-938.40

Finding the Fourth Proportional to 1,377.15, 2,064.03 and 938.40

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Solution

The fourth proportional to 1,377.15, 2,064.03 and 938.40 is: 1,406.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,377.15 : 2,064.03 = 938.40 : x
  2. Step 2: Convert to fraction form
    1,377.15/2,064.03 = 938.40/x
  3. Step 3: Cross multiply
    1,377.15x = 2,064.03 × 938.40
  4. Step 4: Simplify right side
    1,377.15x = 1,936,885.75
  5. Step 5: Solve for x
    x = 1,936,885.75/1,377.15
  6. Step 6: Final answer
    x = 1,406.45

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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.