Home / 4,752.20-7,128.86-1,978.49

Finding the Fourth Proportional to 4,752.20, 7,128.86 and 1,978.49

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Solution

The fourth proportional to 4,752.20, 7,128.86 and 1,978.49 is: 2,967.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,752.20 : 7,128.86 = 1,978.49 : x
  2. Step 2: Convert to fraction form
    4,752.20/7,128.86 = 1,978.49/x
  3. Step 3: Cross multiply
    4,752.20x = 7,128.86 × 1,978.49
  4. Step 4: Simplify right side
    4,752.20x = 14,104,386.15
  5. Step 5: Solve for x
    x = 14,104,386.15/4,752.20
  6. Step 6: Final answer
    x = 2,967.97

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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.