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Finding the Fourth Proportional to 311,391.12, 429,721.06 and 175,426.70

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Solution

The fourth proportional to 311,391.12, 429,721.06 and 175,426.70 is: 242,089.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,391.12 : 429,721.06 = 175,426.70 : x
  2. Step 2: Convert to fraction form
    311,391.12/429,721.06 = 175,426.70/x
  3. Step 3: Cross multiply
    311,391.12x = 429,721.06 × 175,426.70
  4. Step 4: Simplify right side
    311,391.12x = 75,384,547,476.30
  5. Step 5: Solve for x
    x = 75,384,547,476.30/311,391.12
  6. Step 6: Final answer
    x = 242,089.59

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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.