Home / 642,137.59-886,156.34-387,439.57

Finding the Fourth Proportional to 642,137.59, 886,156.34 and 387,439.57

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Solution

The fourth proportional to 642,137.59, 886,156.34 and 387,439.57 is: 534,670.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,137.59 : 886,156.34 = 387,439.57 : x
  2. Step 2: Convert to fraction form
    642,137.59/886,156.34 = 387,439.57/x
  3. Step 3: Cross multiply
    642,137.59x = 886,156.34 × 387,439.57
  4. Step 4: Simplify right side
    642,137.59x = 343,332,031,322.37
  5. Step 5: Solve for x
    x = 343,332,031,322.37/642,137.59
  6. Step 6: Final answer
    x = 534,670.51

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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.