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Finding the Fourth Proportional to 636,911.48, 878,919.72 and 350,431.76

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Solution

The fourth proportional to 636,911.48, 878,919.72 and 350,431.76 is: 483,585.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,911.48 : 878,919.72 = 350,431.76 : x
  2. Step 2: Convert to fraction form
    636,911.48/878,919.72 = 350,431.76/x
  3. Step 3: Cross multiply
    636,911.48x = 878,919.72 × 350,431.76
  4. Step 4: Simplify right side
    636,911.48x = 308,001,384,378.31
  5. Step 5: Solve for x
    x = 308,001,384,378.31/636,911.48
  6. Step 6: Final answer
    x = 483,585.86

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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.