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Finding the Fourth Proportional to 666,421.58, 999,189.48 and 367,043.15

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Solution

The fourth proportional to 666,421.58, 999,189.48 and 367,043.15 is: 550,320.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,421.58 : 999,189.48 = 367,043.15 : x
  2. Step 2: Convert to fraction form
    666,421.58/999,189.48 = 367,043.15/x
  3. Step 3: Cross multiply
    666,421.58x = 999,189.48 × 367,043.15
  4. Step 4: Simplify right side
    666,421.58x = 366,745,654,186.06
  5. Step 5: Solve for x
    x = 366,745,654,186.06/666,421.58
  6. Step 6: Final answer
    x = 550,320.80

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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.