Home / 258,620,515.60-387,930,773.40-212,704,013.20

Finding the Fourth Proportional to 258,620,515.60, 387,930,773.40 and 212,704,013.20

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Solution

The fourth proportional to 258,620,515.60, 387,930,773.40 and 212,704,013.20 is: 319,056,019.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,620,515.60 : 387,930,773.40 = 212,704,013.20 : x
  2. Step 2: Convert to fraction form
    258,620,515.60/387,930,773.40 = 212,704,013.20/x
  3. Step 3: Cross multiply
    258,620,515.60x = 387,930,773.40 × 212,704,013.20
  4. Step 4: Simplify right side
    258,620,515.60x = 82,514,432,345,959,792
  5. Step 5: Solve for x
    x = 82,514,432,345,959,792/258,620,515.60
  6. Step 6: Final answer
    x = 319,056,019.80

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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.