Home / 391,398,666.60-587,097,999.90-210,000,138.60

Finding the Fourth Proportional to 391,398,666.60, 587,097,999.90 and 210,000,138.60

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Solution

The fourth proportional to 391,398,666.60, 587,097,999.90 and 210,000,138.60 is: 315,000,207.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,398,666.60 : 587,097,999.90 = 210,000,138.60 : x
  2. Step 2: Convert to fraction form
    391,398,666.60/587,097,999.90 = 210,000,138.60/x
  3. Step 3: Cross multiply
    391,398,666.60x = 587,097,999.90 × 210,000,138.60
  4. Step 4: Simplify right side
    391,398,666.60x = 123,290,661,350,782,784
  5. Step 5: Solve for x
    x = 123,290,661,350,782,784/391,398,666.60
  6. Step 6: Final answer
    x = 315,000,207.90

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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.