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Finding the Fourth Proportional to 439,974.79, 607,173.80 and 287,110.78

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Solution

The fourth proportional to 439,974.79, 607,173.80 and 287,110.78 is: 396,218.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,974.79 : 607,173.80 = 287,110.78 : x
  2. Step 2: Convert to fraction form
    439,974.79/607,173.80 = 287,110.78/x
  3. Step 3: Cross multiply
    439,974.79x = 607,173.80 × 287,110.78
  4. Step 4: Simplify right side
    439,974.79x = 174,326,143,313.56
  5. Step 5: Solve for x
    x = 174,326,143,313.56/439,974.79
  6. Step 6: Final answer
    x = 396,218.48

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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.