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Finding the Fourth Proportional to 348,049.60, 521,383.20 and 207,390.40

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Solution

The fourth proportional to 348,049.60, 521,383.20 and 207,390.40 is: 310,673.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    348,049.60 : 521,383.20 = 207,390.40 : x
  2. Step 2: Convert to fraction form
    348,049.60/521,383.20 = 207,390.40/x
  3. Step 3: Cross multiply
    348,049.60x = 521,383.20 × 207,390.40
  4. Step 4: Simplify right side
    348,049.60x = 108,129,870,401.28
  5. Step 5: Solve for x
    x = 108,129,870,401.28/348,049.60
  6. Step 6: Final answer
    x = 310,673.74

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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.