Home / 426,379.16-639,354.78-141,969.50

Finding the Fourth Proportional to 426,379.16, 639,354.78 and 141,969.50

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Solution

The fourth proportional to 426,379.16, 639,354.78 and 141,969.50 is: 212,883.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,379.16 : 639,354.78 = 141,969.50 : x
  2. Step 2: Convert to fraction form
    426,379.16/639,354.78 = 141,969.50/x
  3. Step 3: Cross multiply
    426,379.16x = 639,354.78 × 141,969.50
  4. Step 4: Simplify right side
    426,379.16x = 90,768,878,439.21
  5. Step 5: Solve for x
    x = 90,768,878,439.21/426,379.16
  6. Step 6: Final answer
    x = 212,883.01

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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.