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Finding the Fourth Proportional to 487,491,797.82, 672,738,607.98 and 278,652,424.50

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Solution

The fourth proportional to 487,491,797.82, 672,738,607.98 and 278,652,424.50 is: 384,540,304.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,491,797.82 : 672,738,607.98 = 278,652,424.50 : x
  2. Step 2: Convert to fraction form
    487,491,797.82/672,738,607.98 = 278,652,424.50/x
  3. Step 3: Cross multiply
    487,491,797.82x = 672,738,607.98 × 278,652,424.50
  4. Step 4: Simplify right side
    487,491,797.82x = 187,460,244,168,382,048
  5. Step 5: Solve for x
    x = 187,460,244,168,382,048/487,491,797.82
  6. Step 6: Final answer
    x = 384,540,304.08

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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.