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Finding the Fourth Proportional to 391,984.58, 587,974.70 and 142,666.58

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Solution

The fourth proportional to 391,984.58, 587,974.70 and 142,666.58 is: 213,999.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,984.58 : 587,974.70 = 142,666.58 : x
  2. Step 2: Convert to fraction form
    391,984.58/587,974.70 = 142,666.58/x
  3. Step 3: Cross multiply
    391,984.58x = 587,974.70 × 142,666.58
  4. Step 4: Simplify right side
    391,984.58x = 83,884,339,575.53
  5. Step 5: Solve for x
    x = 83,884,339,575.53/391,984.58
  6. Step 6: Final answer
    x = 213,999.08

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1.5x scale

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.