Home / 426,736.57-639,964.14-142,348.75

Finding the Fourth Proportional to 426,736.57, 639,964.14 and 142,348.75

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Solution

The fourth proportional to 426,736.57, 639,964.14 and 142,348.75 is: 213,476.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,736.57 : 639,964.14 = 142,348.75 : x
  2. Step 2: Convert to fraction form
    426,736.57/639,964.14 = 142,348.75/x
  3. Step 3: Cross multiply
    426,736.57x = 639,964.14 × 142,348.75
  4. Step 4: Simplify right side
    426,736.57x = 91,098,095,373.83
  5. Step 5: Solve for x
    x = 91,098,095,373.83/426,736.57
  6. Step 6: Final answer
    x = 213,476.19

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1.5x scale

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.