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Finding the Fourth Proportional to 346,691.80, 520,086.30 and 136,280.80

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Solution

The fourth proportional to 346,691.80, 520,086.30 and 136,280.80 is: 204,440.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    346,691.80 : 520,086.30 = 136,280.80 : x
  2. Step 2: Convert to fraction form
    346,691.80/520,086.30 = 136,280.80/x
  3. Step 3: Cross multiply
    346,691.80x = 520,086.30 × 136,280.80
  4. Step 4: Simplify right side
    346,691.80x = 70,877,777,033.04
  5. Step 5: Solve for x
    x = 70,877,777,033.04/346,691.80
  6. Step 6: Final answer
    x = 204,440.30

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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.