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Finding the Fourth Proportional to 387,280.44, 579,677.46 and 206,915.16

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Solution

The fourth proportional to 387,280.44, 579,677.46 and 206,915.16 is: 309,708.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,280.44 : 579,677.46 = 206,915.16 : x
  2. Step 2: Convert to fraction form
    387,280.44/579,677.46 = 206,915.16/x
  3. Step 3: Cross multiply
    387,280.44x = 579,677.46 × 206,915.16
  4. Step 4: Simplify right side
    387,280.44x = 119,944,054,384.29
  5. Step 5: Solve for x
    x = 119,944,054,384.29/387,280.44
  6. Step 6: Final answer
    x = 309,708.53

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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.