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Finding the Fourth Proportional to 486,600.54, 671,390.55 and 285,357.66

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Solution

The fourth proportional to 486,600.54, 671,390.55 and 285,357.66 is: 393,724.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,600.54 : 671,390.55 = 285,357.66 : x
  2. Step 2: Convert to fraction form
    486,600.54/671,390.55 = 285,357.66/x
  3. Step 3: Cross multiply
    486,600.54x = 671,390.55 × 285,357.66
  4. Step 4: Simplify right side
    486,600.54x = 191,586,436,294.11
  5. Step 5: Solve for x
    x = 191,586,436,294.11/486,600.54
  6. Step 6: Final answer
    x = 393,724.26

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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.