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Finding the Fourth Proportional to 570,239,451.50, 786,930,443.08 and 309,479,067.50

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Solution

The fourth proportional to 570,239,451.50, 786,930,443.08 and 309,479,067.50 is: 427,081,113.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,239,451.50 : 786,930,443.08 = 309,479,067.50 : x
  2. Step 2: Convert to fraction form
    570,239,451.50/786,930,443.08 = 309,479,067.50/x
  3. Step 3: Cross multiply
    570,239,451.50x = 786,930,443.08 × 309,479,067.50
  4. Step 4: Simplify right side
    570,239,451.50x = 243,538,499,711,760,256
  5. Step 5: Solve for x
    x = 243,538,499,711,760,256/570,239,451.50
  6. Step 6: Final answer
    x = 427,081,113.16

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.