Home / 1,289.03-1,931.23-1,013.78

Finding the Fourth Proportional to 1,289.03, 1,931.23 and 1,013.78

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Solution

The fourth proportional to 1,289.03, 1,931.23 and 1,013.78 is: 1,518.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,289.03 : 1,931.23 = 1,013.78 : x
  2. Step 2: Convert to fraction form
    1,289.03/1,931.23 = 1,013.78/x
  3. Step 3: Cross multiply
    1,289.03x = 1,931.23 × 1,013.78
  4. Step 4: Simplify right side
    1,289.03x = 1,957,842.35
  5. Step 5: Solve for x
    x = 1,957,842.35/1,289.03
  6. Step 6: Final answer
    x = 1,518.85

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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.