Home / 5,190.18-7,780.32-1,725

Finding the Fourth Proportional to 5,190.18, 7,780.32 and 1,725

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Solution

The fourth proportional to 5,190.18, 7,780.32 and 1,725 is: 2,585.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,190.18 : 7,780.32 = 1,725 : x
  2. Step 2: Convert to fraction form
    5,190.18/7,780.32 = 1,725/x
  3. Step 3: Cross multiply
    5,190.18x = 7,780.32 × 1,725
  4. Step 4: Simplify right side
    5,190.18x = 13,421,052
  5. Step 5: Solve for x
    x = 13,421,052/5,190.18
  6. Step 6: Final answer
    x = 2,585.85

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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.