Home / 426,387.02-639,571.75-142,098.21

Finding the Fourth Proportional to 426,387.02, 639,571.75 and 142,098.21

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Solution

The fourth proportional to 426,387.02, 639,571.75 and 142,098.21 is: 213,144.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,387.02 : 639,571.75 = 142,098.21 : x
  2. Step 2: Convert to fraction form
    426,387.02/639,571.75 = 142,098.21/x
  3. Step 3: Cross multiply
    426,387.02x = 639,571.75 × 142,098.21
  4. Step 4: Simplify right side
    426,387.02x = 90,882,000,486.32
  5. Step 5: Solve for x
    x = 90,882,000,486.32/426,387.02
  6. Step 6: Final answer
    x = 213,144.39

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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.