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Finding the Fourth Proportional to 485,599.63, 670,176.45 and 281,712.91

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Solution

The fourth proportional to 485,599.63, 670,176.45 and 281,712.91 is: 388,792.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,599.63 : 670,176.45 = 281,712.91 : x
  2. Step 2: Convert to fraction form
    485,599.63/670,176.45 = 281,712.91/x
  3. Step 3: Cross multiply
    485,599.63x = 670,176.45 × 281,712.91
  4. Step 4: Simplify right side
    485,599.63x = 188,797,357,942.97
  5. Step 5: Solve for x
    x = 188,797,357,942.97/485,599.63
  6. Step 6: Final answer
    x = 388,792.22

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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.