Home / 287,712,981.20-431,569,471.80-263,904,424.40

Finding the Fourth Proportional to 287,712,981.20, 431,569,471.80 and 263,904,424.40

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Solution

The fourth proportional to 287,712,981.20, 431,569,471.80 and 263,904,424.40 is: 395,856,636.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,712,981.20 : 431,569,471.80 = 263,904,424.40 : x
  2. Step 2: Convert to fraction form
    287,712,981.20/431,569,471.80 = 263,904,424.40/x
  3. Step 3: Cross multiply
    287,712,981.20x = 431,569,471.80 × 263,904,424.40
  4. Step 4: Simplify right side
    287,712,981.20x = 113,893,093,043,991,040
  5. Step 5: Solve for x
    x = 113,893,093,043,991,040/287,712,981.20
  6. Step 6: Final answer
    x = 395,856,636.60

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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.