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Finding the Fourth Proportional to 349,443.60, 523,819.80 and 138,800.40

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Solution

The fourth proportional to 349,443.60, 523,819.80 and 138,800.40 is: 208,063.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    349,443.60 : 523,819.80 = 138,800.40 : x
  2. Step 2: Convert to fraction form
    349,443.60/523,819.80 = 138,800.40/x
  3. Step 3: Cross multiply
    349,443.60x = 523,819.80 × 138,800.40
  4. Step 4: Simplify right side
    349,443.60x = 72,706,397,767.92
  5. Step 5: Solve for x
    x = 72,706,397,767.92/349,443.60
  6. Step 6: Final answer
    x = 208,063.33

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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.