Home / 287,712,005.20-431,568,007.80-263,903,448.40

Finding the Fourth Proportional to 287,712,005.20, 431,568,007.80 and 263,903,448.40

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Solution

The fourth proportional to 287,712,005.20, 431,568,007.80 and 263,903,448.40 is: 395,855,172.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,712,005.20 : 431,568,007.80 = 263,903,448.40 : x
  2. Step 2: Convert to fraction form
    287,712,005.20/431,568,007.80 = 263,903,448.40/x
  3. Step 3: Cross multiply
    287,712,005.20x = 431,568,007.80 × 263,903,448.40
  4. Step 4: Simplify right side
    287,712,005.20x = 113,892,285,477,538,096
  5. Step 5: Solve for x
    x = 113,892,285,477,538,096/287,712,005.20
  6. Step 6: Final answer
    x = 395,855,172.60

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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.