Home / 378,897,815.40-568,346,723.10-215,639,140.20

Finding the Fourth Proportional to 378,897,815.40, 568,346,723.10 and 215,639,140.20

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Solution

The fourth proportional to 378,897,815.40, 568,346,723.10 and 215,639,140.20 is: 323,458,710.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,897,815.40 : 568,346,723.10 = 215,639,140.20 : x
  2. Step 2: Convert to fraction form
    378,897,815.40/568,346,723.10 = 215,639,140.20/x
  3. Step 3: Cross multiply
    378,897,815.40x = 568,346,723.10 × 215,639,140.20
  4. Step 4: Simplify right side
    378,897,815.40x = 122,557,798,704,771,472
  5. Step 5: Solve for x
    x = 122,557,798,704,771,472/378,897,815.40
  6. Step 6: Final answer
    x = 323,458,710.30

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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.