Home / 391,217,928.78-539,886,005.82-212,605,362.60

Finding the Fourth Proportional to 391,217,928.78, 539,886,005.82 and 212,605,362.60

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Solution

The fourth proportional to 391,217,928.78, 539,886,005.82 and 212,605,362.60 is: 293,398,261.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,217,928.78 : 539,886,005.82 = 212,605,362.60 : x
  2. Step 2: Convert to fraction form
    391,217,928.78/539,886,005.82 = 212,605,362.60/x
  3. Step 3: Cross multiply
    391,217,928.78x = 539,886,005.82 × 212,605,362.60
  4. Step 4: Simplify right side
    391,217,928.78x = 114,782,660,030,026,816
  5. Step 5: Solve for x
    x = 114,782,660,030,026,816/391,217,928.78
  6. Step 6: Final answer
    x = 293,398,261.14

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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.