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Finding the Fourth Proportional to 311,135.64, 429,362.28 and 175,169.28

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Solution

The fourth proportional to 311,135.64, 429,362.28 and 175,169.28 is: 241,730.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,135.64 : 429,362.28 = 175,169.28 : x
  2. Step 2: Convert to fraction form
    311,135.64/429,362.28 = 175,169.28/x
  3. Step 3: Cross multiply
    311,135.64x = 429,362.28 × 175,169.28
  4. Step 4: Simplify right side
    311,135.64x = 75,211,081,446.76
  5. Step 5: Solve for x
    x = 75,211,081,446.76/311,135.64
  6. Step 6: Final answer
    x = 241,730.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.