Home / 865,205,609.85-1,297,808,431.25-210,152,222.46

Finding the Fourth Proportional to 865,205,609.85, 1,297,808,431.25 and 210,152,222.46

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Solution

The fourth proportional to 865,205,609.85, 1,297,808,431.25 and 210,152,222.46 is: 315,228,337.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    865,205,609.85 : 1,297,808,431.25 = 210,152,222.46 : x
  2. Step 2: Convert to fraction form
    865,205,609.85/1,297,808,431.25 = 210,152,222.46/x
  3. Step 3: Cross multiply
    865,205,609.85x = 1,297,808,431.25 × 210,152,222.46
  4. Step 4: Simplify right side
    865,205,609.85x = 272,737,326,153,462,848
  5. Step 5: Solve for x
    x = 272,737,326,153,462,848/865,205,609.85
  6. Step 6: Final answer
    x = 315,228,337.69

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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.