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Finding the Fourth Proportional to 276,681.60, 415,022.40 and 252,187.20

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Solution

The fourth proportional to 276,681.60, 415,022.40 and 252,187.20 is: 378,280.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,681.60 : 415,022.40 = 252,187.20 : x
  2. Step 2: Convert to fraction form
    276,681.60/415,022.40 = 252,187.20/x
  3. Step 3: Cross multiply
    276,681.60x = 415,022.40 × 252,187.20
  4. Step 4: Simplify right side
    276,681.60x = 104,663,336,993.28
  5. Step 5: Solve for x
    x = 104,663,336,993.28/276,681.60
  6. Step 6: Final answer
    x = 378,280.80

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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.