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Finding the Fourth Proportional to 279,513.60, 419,270.40 and 257,862.30

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Solution

The fourth proportional to 279,513.60, 419,270.40 and 257,862.30 is: 386,793.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,513.60 : 419,270.40 = 257,862.30 : x
  2. Step 2: Convert to fraction form
    279,513.60/419,270.40 = 257,862.30/x
  3. Step 3: Cross multiply
    279,513.60x = 419,270.40 × 257,862.30
  4. Step 4: Simplify right side
    279,513.60x = 108,114,029,665.92
  5. Step 5: Solve for x
    x = 108,114,029,665.92/279,513.60
  6. Step 6: Final answer
    x = 386,793.45

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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.