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Finding the Fourth Proportional to 485,223.16, 669,610.62 and 281,394.93

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Solution

The fourth proportional to 485,223.16, 669,610.62 and 281,394.93 is: 388,326.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,223.16 : 669,610.62 = 281,394.93 : x
  2. Step 2: Convert to fraction form
    485,223.16/669,610.62 = 281,394.93/x
  3. Step 3: Cross multiply
    485,223.16x = 669,610.62 × 281,394.93
  4. Step 4: Simplify right side
    485,223.16x = 188,425,033,542.16
  5. Step 5: Solve for x
    x = 188,425,033,542.16/485,223.16
  6. Step 6: Final answer
    x = 388,326.55

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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.