Home / 3,123.60-4,690.80-1,665.60

Finding the Fourth Proportional to 3,123.60, 4,690.80 and 1,665.60

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Solution

The fourth proportional to 3,123.60, 4,690.80 and 1,665.60 is: 2,501.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,123.60 : 4,690.80 = 1,665.60 : x
  2. Step 2: Convert to fraction form
    3,123.60/4,690.80 = 1,665.60/x
  3. Step 3: Cross multiply
    3,123.60x = 4,690.80 × 1,665.60
  4. Step 4: Simplify right side
    3,123.60x = 7,812,996.48
  5. Step 5: Solve for x
    x = 7,812,996.48/3,123.60
  6. Step 6: Final answer
    x = 2,501.28

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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.