Home / 426,682.15-639,808.95-142,272.02

Finding the Fourth Proportional to 426,682.15, 639,808.95 and 142,272.02

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Solution

The fourth proportional to 426,682.15, 639,808.95 and 142,272.02 is: 213,336.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,682.15 : 639,808.95 = 142,272.02 : x
  2. Step 2: Convert to fraction form
    426,682.15/639,808.95 = 142,272.02/x
  3. Step 3: Cross multiply
    426,682.15x = 639,808.95 × 142,272.02
  4. Step 4: Simplify right side
    426,682.15x = 91,026,913,863.62
  5. Step 5: Solve for x
    x = 91,026,913,863.62/426,682.15
  6. Step 6: Final answer
    x = 213,336.59

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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.