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Finding the Fourth Proportional to 290,671,962.40, 436,091,924.40 and 86,204,958.40

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Solution

The fourth proportional to 290,671,962.40, 436,091,924.40 and 86,204,958.40 is: 129,332,343.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,671,962.40 : 436,091,924.40 = 86,204,958.40 : x
  2. Step 2: Convert to fraction form
    290,671,962.40/436,091,924.40 = 86,204,958.40/x
  3. Step 3: Cross multiply
    290,671,962.40x = 436,091,924.40 × 86,204,958.40
  4. Step 4: Simplify right side
    290,671,962.40x = 37,593,286,201,477,944
  5. Step 5: Solve for x
    x = 37,593,286,201,477,944/290,671,962.40
  6. Step 6: Final answer
    x = 129,332,343.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.