Home / 4,753.20-7,129.80-1,290.45

Finding the Fourth Proportional to 4,753.20, 7,129.80 and 1,290.45

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Solution

The fourth proportional to 4,753.20, 7,129.80 and 1,290.45 is: 1,935.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,753.20 : 7,129.80 = 1,290.45 : x
  2. Step 2: Convert to fraction form
    4,753.20/7,129.80 = 1,290.45/x
  3. Step 3: Cross multiply
    4,753.20x = 7,129.80 × 1,290.45
  4. Step 4: Simplify right side
    4,753.20x = 9,200,650.41
  5. Step 5: Solve for x
    x = 9,200,650.41/4,753.20
  6. Step 6: Final answer
    x = 1,935.68

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1.5x scale

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.