Home / 426,489.40-639,690.14-142,149.23

Finding the Fourth Proportional to 426,489.40, 639,690.14 and 142,149.23

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Solution

The fourth proportional to 426,489.40, 639,690.14 and 142,149.23 is: 213,209.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,489.40 : 639,690.14 = 142,149.23 : x
  2. Step 2: Convert to fraction form
    426,489.40/639,690.14 = 142,149.23/x
  3. Step 3: Cross multiply
    426,489.40x = 639,690.14 × 142,149.23
  4. Step 4: Simplify right side
    426,489.40x = 90,931,457,996.51
  5. Step 5: Solve for x
    x = 90,931,457,996.51/426,489.40
  6. Step 6: Final answer
    x = 213,209.19

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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.