Home / 281,328.91-388,234.55-154,012.70

Finding the Fourth Proportional to 281,328.91, 388,234.55 and 154,012.70

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Solution

The fourth proportional to 281,328.91, 388,234.55 and 154,012.70 is: 212,537.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,328.91 : 388,234.55 = 154,012.70 : x
  2. Step 2: Convert to fraction form
    281,328.91/388,234.55 = 154,012.70/x
  3. Step 3: Cross multiply
    281,328.91x = 388,234.55 × 154,012.70
  4. Step 4: Simplify right side
    281,328.91x = 59,793,050,508.72
  5. Step 5: Solve for x
    x = 59,793,050,508.72/281,328.91
  6. Step 6: Final answer
    x = 212,537.89

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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.