Home / 280,712.31-387,392.56-153,396.11

Finding the Fourth Proportional to 280,712.31, 387,392.56 and 153,396.11

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Solution

The fourth proportional to 280,712.31, 387,392.56 and 153,396.11 is: 211,691.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,712.31 : 387,392.56 = 153,396.11 : x
  2. Step 2: Convert to fraction form
    280,712.31/387,392.56 = 153,396.11/x
  3. Step 3: Cross multiply
    280,712.31x = 387,392.56 × 153,396.11
  4. Step 4: Simplify right side
    280,712.31x = 59,424,511,746.94
  5. Step 5: Solve for x
    x = 59,424,511,746.94/280,712.31
  6. Step 6: Final answer
    x = 211,691.86

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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.