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Finding the Fourth Proportional to 487,491,799.32, 672,738,610.05 and 278,652,426

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Solution

The fourth proportional to 487,491,799.32, 672,738,610.05 and 278,652,426 is: 384,540,306.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,491,799.32 : 672,738,610.05 = 278,652,426 : x
  2. Step 2: Convert to fraction form
    487,491,799.32/672,738,610.05 = 278,652,426/x
  3. Step 3: Cross multiply
    487,491,799.32x = 672,738,610.05 × 278,652,426
  4. Step 4: Simplify right side
    487,491,799.32x = 187,460,245,754,300,480
  5. Step 5: Solve for x
    x = 187,460,245,754,300,480/487,491,799.32
  6. Step 6: Final answer
    x = 384,540,306.15

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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.