Home / 390,887,804.40-539,304,211.80-225,815,143.92

Finding the Fourth Proportional to 390,887,804.40, 539,304,211.80 and 225,815,143.92

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Solution

The fourth proportional to 390,887,804.40, 539,304,211.80 and 225,815,143.92 is: 311,555,021.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,887,804.40 : 539,304,211.80 = 225,815,143.92 : x
  2. Step 2: Convert to fraction form
    390,887,804.40/539,304,211.80 = 225,815,143.92/x
  3. Step 3: Cross multiply
    390,887,804.40x = 539,304,211.80 × 225,815,143.92
  4. Step 4: Simplify right side
    390,887,804.40x = 121,783,058,204,279,152
  5. Step 5: Solve for x
    x = 121,783,058,204,279,152/390,887,804.40
  6. Step 6: Final answer
    x = 311,555,021.25

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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.