Home / 426,390.02-639,576.25-142,101.21

Finding the Fourth Proportional to 426,390.02, 639,576.25 and 142,101.21

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Solution

The fourth proportional to 426,390.02, 639,576.25 and 142,101.21 is: 213,148.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,390.02 : 639,576.25 = 142,101.21 : x
  2. Step 2: Convert to fraction form
    426,390.02/639,576.25 = 142,101.21/x
  3. Step 3: Cross multiply
    426,390.02x = 639,576.25 × 142,101.21
  4. Step 4: Simplify right side
    426,390.02x = 90,884,559,012.26
  5. Step 5: Solve for x
    x = 90,884,559,012.26/426,390.02
  6. Step 6: Final answer
    x = 213,148.89

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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.