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Finding the Fourth Proportional to 393,322.20, 590,129.10 and 378,742.20

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Solution

The fourth proportional to 393,322.20, 590,129.10 and 378,742.20 is: 568,253.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,322.20 : 590,129.10 = 378,742.20 : x
  2. Step 2: Convert to fraction form
    393,322.20/590,129.10 = 378,742.20/x
  3. Step 3: Cross multiply
    393,322.20x = 590,129.10 × 378,742.20
  4. Step 4: Simplify right side
    393,322.20x = 223,506,793,618.02
  5. Step 5: Solve for x
    x = 223,506,793,618.02/393,322.20
  6. Step 6: Final answer
    x = 568,253.70

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1.5x scale

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.