Home / 438,421.80-656,466.30-279,791.40

Finding the Fourth Proportional to 438,421.80, 656,466.30 and 279,791.40

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Solution

The fourth proportional to 438,421.80, 656,466.30 and 279,791.40 is: 418,942.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,421.80 : 656,466.30 = 279,791.40 : x
  2. Step 2: Convert to fraction form
    438,421.80/656,466.30 = 279,791.40/x
  3. Step 3: Cross multiply
    438,421.80x = 656,466.30 × 279,791.40
  4. Step 4: Simplify right side
    438,421.80x = 183,673,625,129.82
  5. Step 5: Solve for x
    x = 183,673,625,129.82/438,421.80
  6. Step 6: Final answer
    x = 418,942.73

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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.