Home / 287,712,997.70-431,569,496.55-263,904,440.90

Finding the Fourth Proportional to 287,712,997.70, 431,569,496.55 and 263,904,440.90

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Solution

The fourth proportional to 287,712,997.70, 431,569,496.55 and 263,904,440.90 is: 395,856,661.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,712,997.70 : 431,569,496.55 = 263,904,440.90 : x
  2. Step 2: Convert to fraction form
    287,712,997.70/431,569,496.55 = 263,904,440.90/x
  3. Step 3: Cross multiply
    287,712,997.70x = 431,569,496.55 × 263,904,440.90
  4. Step 4: Simplify right side
    287,712,997.70x = 113,893,106,696,522,240
  5. Step 5: Solve for x
    x = 113,893,106,696,522,240/287,712,997.70
  6. Step 6: Final answer
    x = 395,856,661.35

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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.