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Finding the Fourth Proportional to 462,987.70, 638,919.57 and 261,790.90

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Solution

The fourth proportional to 462,987.70, 638,919.57 and 261,790.90 is: 361,269.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    462,987.70 : 638,919.57 = 261,790.90 : x
  2. Step 2: Convert to fraction form
    462,987.70/638,919.57 = 261,790.90/x
  3. Step 3: Cross multiply
    462,987.70x = 638,919.57 × 261,790.90
  4. Step 4: Simplify right side
    462,987.70x = 167,263,329,257.91
  5. Step 5: Solve for x
    x = 167,263,329,257.91/462,987.70
  6. Step 6: Final answer
    x = 361,269.49

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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.