Home / 426,395.81-639,584.85-142,106.96

Finding the Fourth Proportional to 426,395.81, 639,584.85 and 142,106.96

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Solution

The fourth proportional to 426,395.81, 639,584.85 and 142,106.96 is: 213,157.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,395.81 : 639,584.85 = 142,106.96 : x
  2. Step 2: Convert to fraction form
    426,395.81/639,584.85 = 142,106.96/x
  3. Step 3: Cross multiply
    426,395.81x = 639,584.85 × 142,106.96
  4. Step 4: Simplify right side
    426,395.81x = 90,889,458,695.56
  5. Step 5: Solve for x
    x = 90,889,458,695.56/426,395.81
  6. Step 6: Final answer
    x = 213,157.49

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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.