Home / 1,605.20-2,408.80-875.36

Finding the Fourth Proportional to 1,605.20, 2,408.80 and 875.36

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Solution

The fourth proportional to 1,605.20, 2,408.80 and 875.36 is: 1,313.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,605.20 : 2,408.80 = 875.36 : x
  2. Step 2: Convert to fraction form
    1,605.20/2,408.80 = 875.36/x
  3. Step 3: Cross multiply
    1,605.20x = 2,408.80 × 875.36
  4. Step 4: Simplify right side
    1,605.20x = 2,108,567.17
  5. Step 5: Solve for x
    x = 2,108,567.17/1,605.20
  6. Step 6: Final answer
    x = 1,313.59

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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.