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Finding the Fourth Proportional to 391,058.46, 539,660.64 and 212,210.46

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Solution

The fourth proportional to 391,058.46, 539,660.64 and 212,210.46 is: 292,850.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,058.46 : 539,660.64 = 212,210.46 : x
  2. Step 2: Convert to fraction form
    391,058.46/539,660.64 = 212,210.46/x
  3. Step 3: Cross multiply
    391,058.46x = 539,660.64 × 212,210.46
  4. Step 4: Simplify right side
    391,058.46x = 114,521,632,658.29
  5. Step 5: Solve for x
    x = 114,521,632,658.29/391,058.46
  6. Step 6: Final answer
    x = 292,850.42

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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.