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Finding the Fourth Proportional to 393,143.10, 589,714.65 and 168,465.30

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Solution

The fourth proportional to 393,143.10, 589,714.65 and 168,465.30 is: 252,697.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,143.10 : 589,714.65 = 168,465.30 : x
  2. Step 2: Convert to fraction form
    393,143.10/589,714.65 = 168,465.30/x
  3. Step 3: Cross multiply
    393,143.10x = 589,714.65 × 168,465.30
  4. Step 4: Simplify right side
    393,143.10x = 99,346,455,426.65
  5. Step 5: Solve for x
    x = 99,346,455,426.65/393,143.10
  6. Step 6: Final answer
    x = 252,697.95

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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.