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Finding the Fourth Proportional to 389,712.30, 584,568.45 and 256,669.80

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Solution

The fourth proportional to 389,712.30, 584,568.45 and 256,669.80 is: 385,004.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,712.30 : 584,568.45 = 256,669.80 : x
  2. Step 2: Convert to fraction form
    389,712.30/584,568.45 = 256,669.80/x
  3. Step 3: Cross multiply
    389,712.30x = 584,568.45 × 256,669.80
  4. Step 4: Simplify right side
    389,712.30x = 150,041,067,147.81
  5. Step 5: Solve for x
    x = 150,041,067,147.81/389,712.30
  6. Step 6: Final answer
    x = 385,004.70

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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.