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Finding the Fourth Proportional to 393,145.60, 589,718.40 and 168,467.80

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Solution

The fourth proportional to 393,145.60, 589,718.40 and 168,467.80 is: 252,701.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,145.60 : 589,718.40 = 168,467.80 : x
  2. Step 2: Convert to fraction form
    393,145.60/589,718.40 = 168,467.80/x
  3. Step 3: Cross multiply
    393,145.60x = 589,718.40 × 168,467.80
  4. Step 4: Simplify right side
    393,145.60x = 99,348,561,467.52
  5. Step 5: Solve for x
    x = 99,348,561,467.52/393,145.60
  6. Step 6: Final answer
    x = 252,701.70

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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.