Home / 639,860.72-959,966.41-279,966.32

Finding the Fourth Proportional to 639,860.72, 959,966.41 and 279,966.32

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Solution

The fourth proportional to 639,860.72, 959,966.41 and 279,966.32 is: 420,026.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,860.72 : 959,966.41 = 279,966.32 : x
  2. Step 2: Convert to fraction form
    639,860.72/959,966.41 = 279,966.32/x
  3. Step 3: Cross multiply
    639,860.72x = 959,966.41 × 279,966.32
  4. Step 4: Simplify right side
    639,860.72x = 268,758,264,831.31
  5. Step 5: Solve for x
    x = 268,758,264,831.31/639,860.72
  6. Step 6: Final answer
    x = 420,026.20

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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.