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Finding the Fourth Proportional to 667,894.55, 921,740.58 and 406,351.91

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Solution

The fourth proportional to 667,894.55, 921,740.58 and 406,351.91 is: 560,793.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,894.55 : 921,740.58 = 406,351.91 : x
  2. Step 2: Convert to fraction form
    667,894.55/921,740.58 = 406,351.91/x
  3. Step 3: Cross multiply
    667,894.55x = 921,740.58 × 406,351.91
  4. Step 4: Simplify right side
    667,894.55x = 374,551,040,598.81
  5. Step 5: Solve for x
    x = 374,551,040,598.81/667,894.55
  6. Step 6: Final answer
    x = 560,793.68

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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.