Home / 426,208.50-639,317.61-126,681.30

Finding the Fourth Proportional to 426,208.50, 639,317.61 and 126,681.30

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Solution

The fourth proportional to 426,208.50, 639,317.61 and 126,681.30 is: 190,023.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,208.50 : 639,317.61 = 126,681.30 : x
  2. Step 2: Convert to fraction form
    426,208.50/639,317.61 = 126,681.30/x
  3. Step 3: Cross multiply
    426,208.50x = 639,317.61 × 126,681.30
  4. Step 4: Simplify right side
    426,208.50x = 80,989,585,947.69
  5. Step 5: Solve for x
    x = 80,989,585,947.69/426,208.50
  6. Step 6: Final answer
    x = 190,023.39

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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.