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Finding the Fourth Proportional to 293,138.80, 439,708.20 and 251,148.40

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Solution

The fourth proportional to 293,138.80, 439,708.20 and 251,148.40 is: 376,722.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    293,138.80 : 439,708.20 = 251,148.40 : x
  2. Step 2: Convert to fraction form
    293,138.80/439,708.20 = 251,148.40/x
  3. Step 3: Cross multiply
    293,138.80x = 439,708.20 × 251,148.40
  4. Step 4: Simplify right side
    293,138.80x = 110,432,010,896.88
  5. Step 5: Solve for x
    x = 110,432,010,896.88/293,138.80
  6. Step 6: Final answer
    x = 376,722.60

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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.