Home / 647,215,384.92-970,716,789.12-278,651,111.40

Finding the Fourth Proportional to 647,215,384.92, 970,716,789.12 and 278,651,111.40

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Solution

The fourth proportional to 647,215,384.92, 970,716,789.12 and 278,651,111.40 is: 417,930,905.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,215,384.92 : 970,716,789.12 = 278,651,111.40 : x
  2. Step 2: Convert to fraction form
    647,215,384.92/970,716,789.12 = 278,651,111.40/x
  3. Step 3: Cross multiply
    647,215,384.92x = 970,716,789.12 × 278,651,111.40
  4. Step 4: Simplify right side
    647,215,384.92x = 270,491,312,142,927,392
  5. Step 5: Solve for x
    x = 270,491,312,142,927,392/647,215,384.92
  6. Step 6: Final answer
    x = 417,930,905.92

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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.