Home / 1,089.30-1,503.26-617.15

Finding the Fourth Proportional to 1,089.30, 1,503.26 and 617.15

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Solution

The fourth proportional to 1,089.30, 1,503.26 and 617.15 is: 851.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,089.30 : 1,503.26 = 617.15 : x
  2. Step 2: Convert to fraction form
    1,089.30/1,503.26 = 617.15/x
  3. Step 3: Cross multiply
    1,089.30x = 1,503.26 × 617.15
  4. Step 4: Simplify right side
    1,089.30x = 927,726.31
  5. Step 5: Solve for x
    x = 927,726.31/1,089.30
  6. Step 6: Final answer
    x = 851.67

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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.