Home / 1,615.08-2,420.20-747.60

Finding the Fourth Proportional to 1,615.08, 2,420.20 and 747.60

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Solution

The fourth proportional to 1,615.08, 2,420.20 and 747.60 is: 1,120.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,615.08 : 2,420.20 = 747.60 : x
  2. Step 2: Convert to fraction form
    1,615.08/2,420.20 = 747.60/x
  3. Step 3: Cross multiply
    1,615.08x = 2,420.20 × 747.60
  4. Step 4: Simplify right side
    1,615.08x = 1,809,341.52
  5. Step 5: Solve for x
    x = 1,809,341.52/1,615.08
  6. Step 6: Final answer
    x = 1,120.28

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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.