Home / 287,712,004.90-431,568,007.35-261,352,531.30

Finding the Fourth Proportional to 287,712,004.90, 431,568,007.35 and 261,352,531.30

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Solution

The fourth proportional to 287,712,004.90, 431,568,007.35 and 261,352,531.30 is: 392,028,796.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,712,004.90 : 431,568,007.35 = 261,352,531.30 : x
  2. Step 2: Convert to fraction form
    287,712,004.90/431,568,007.35 = 261,352,531.30/x
  3. Step 3: Cross multiply
    287,712,004.90x = 431,568,007.35 × 261,352,531.30
  4. Step 4: Simplify right side
    287,712,004.90x = 112,791,391,149,019,520
  5. Step 5: Solve for x
    x = 112,791,391,149,019,520/287,712,004.90
  6. Step 6: Final answer
    x = 392,028,796.95

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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.