Home / 425,823.70-638,868.60-126,305.95

Finding the Fourth Proportional to 425,823.70, 638,868.60 and 126,305.95

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Solution

The fourth proportional to 425,823.70, 638,868.60 and 126,305.95 is: 189,498.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,823.70 : 638,868.60 = 126,305.95 : x
  2. Step 2: Convert to fraction form
    425,823.70/638,868.60 = 126,305.95/x
  3. Step 3: Cross multiply
    425,823.70x = 638,868.60 × 126,305.95
  4. Step 4: Simplify right side
    425,823.70x = 80,692,905,448.17
  5. Step 5: Solve for x
    x = 80,692,905,448.17/425,823.70
  6. Step 6: Final answer
    x = 189,498.39

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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.