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Finding the Fourth Proportional to 387,673.43, 580,916.61 and 260,843.90

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Solution

The fourth proportional to 387,673.43, 580,916.61 and 260,843.90 is: 390,866.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,673.43 : 580,916.61 = 260,843.90 : x
  2. Step 2: Convert to fraction form
    387,673.43/580,916.61 = 260,843.90/x
  3. Step 3: Cross multiply
    387,673.43x = 580,916.61 × 260,843.90
  4. Step 4: Simplify right side
    387,673.43x = 151,528,551,222.60
  5. Step 5: Solve for x
    x = 151,528,551,222.60/387,673.43
  6. Step 6: Final answer
    x = 390,866.49

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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.