Home / 3,178.02-4,385.50-1,761.60

Finding the Fourth Proportional to 3,178.02, 4,385.50 and 1,761.60

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Solution

The fourth proportional to 3,178.02, 4,385.50 and 1,761.60 is: 2,430.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,178.02 : 4,385.50 = 1,761.60 : x
  2. Step 2: Convert to fraction form
    3,178.02/4,385.50 = 1,761.60/x
  3. Step 3: Cross multiply
    3,178.02x = 4,385.50 × 1,761.60
  4. Step 4: Simplify right side
    3,178.02x = 7,725,496.80
  5. Step 5: Solve for x
    x = 7,725,496.80/3,178.02
  6. Step 6: Final answer
    x = 2,430.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.