Home / 287,687.03-397,178.20-255,767.59

Finding the Fourth Proportional to 287,687.03, 397,178.20 and 255,767.59

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Solution

The fourth proportional to 287,687.03, 397,178.20 and 255,767.59 is: 353,110.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,687.03 : 397,178.20 = 255,767.59 : x
  2. Step 2: Convert to fraction form
    287,687.03/397,178.20 = 255,767.59/x
  3. Step 3: Cross multiply
    287,687.03x = 397,178.20 × 255,767.59
  4. Step 4: Simplify right side
    287,687.03x = 101,585,311,830.72
  5. Step 5: Solve for x
    x = 101,585,311,830.72/287,687.03
  6. Step 6: Final answer
    x = 353,110.51

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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.