Home / 515,813,113.34-711,819,064.42-280,863,211.27

Finding the Fourth Proportional to 515,813,113.34, 711,819,064.42 and 280,863,211.27

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Solution

The fourth proportional to 515,813,113.34, 711,819,064.42 and 280,863,211.27 is: 387,589,580.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,813,113.34 : 711,819,064.42 = 280,863,211.27 : x
  2. Step 2: Convert to fraction form
    515,813,113.34/711,819,064.42 = 280,863,211.27/x
  3. Step 3: Cross multiply
    515,813,113.34x = 711,819,064.42 × 280,863,211.27
  4. Step 4: Simplify right side
    515,813,113.34x = 199,923,788,273,726,496
  5. Step 5: Solve for x
    x = 199,923,788,273,726,496/515,813,113.34
  6. Step 6: Final answer
    x = 387,589,580.61

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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.