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Finding the Fourth Proportional to 425,713.68, 587,587.23 and 255,915

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Solution

The fourth proportional to 425,713.68, 587,587.23 and 255,915 is: 353,224.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,713.68 : 587,587.23 = 255,915 : x
  2. Step 2: Convert to fraction form
    425,713.68/587,587.23 = 255,915/x
  3. Step 3: Cross multiply
    425,713.68x = 587,587.23 × 255,915
  4. Step 4: Simplify right side
    425,713.68x = 150,372,385,965.45
  5. Step 5: Solve for x
    x = 150,372,385,965.45/425,713.68
  6. Step 6: Final answer
    x = 353,224.23

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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.