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Finding the Fourth Proportional to 346,689.40, 520,091.70 and 136,334.20

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Solution

The fourth proportional to 346,689.40, 520,091.70 and 136,334.20 is: 204,523.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    346,689.40 : 520,091.70 = 136,334.20 : x
  2. Step 2: Convert to fraction form
    346,689.40/520,091.70 = 136,334.20/x
  3. Step 3: Cross multiply
    346,689.40x = 520,091.70 × 136,334.20
  4. Step 4: Simplify right side
    346,689.40x = 70,906,285,846.14
  5. Step 5: Solve for x
    x = 70,906,285,846.14/346,689.40
  6. Step 6: Final answer
    x = 204,523.95

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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.