Home / 287,725.05-397,230.89-255,805.65

Finding the Fourth Proportional to 287,725.05, 397,230.89 and 255,805.65

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Solution

The fourth proportional to 287,725.05, 397,230.89 and 255,805.65 is: 353,163.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,725.05 : 397,230.89 = 255,805.65 : x
  2. Step 2: Convert to fraction form
    287,725.05/397,230.89 = 255,805.65/x
  3. Step 3: Cross multiply
    287,725.05x = 397,230.89 × 255,805.65
  4. Step 4: Simplify right side
    287,725.05x = 101,613,904,737.50
  5. Step 5: Solve for x
    x = 101,613,904,737.50/287,725.05
  6. Step 6: Final answer
    x = 353,163.22

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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.