Home / 281,147.39-387,579.85-200,434.78

Finding the Fourth Proportional to 281,147.39, 387,579.85 and 200,434.78

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Solution

The fourth proportional to 281,147.39, 387,579.85 and 200,434.78 is: 276,312.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,147.39 : 387,579.85 = 200,434.78 : x
  2. Step 2: Convert to fraction form
    281,147.39/387,579.85 = 200,434.78/x
  3. Step 3: Cross multiply
    281,147.39x = 387,579.85 × 200,434.78
  4. Step 4: Simplify right side
    281,147.39x = 77,684,483,053.10
  5. Step 5: Solve for x
    x = 77,684,483,053.10/281,147.39
  6. Step 6: Final answer
    x = 276,312.31

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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.