Home / 422,915.12-634,373.76-142,629.20

Finding the Fourth Proportional to 422,915.12, 634,373.76 and 142,629.20

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Solution

The fourth proportional to 422,915.12, 634,373.76 and 142,629.20 is: 213,944.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,915.12 : 634,373.76 = 142,629.20 : x
  2. Step 2: Convert to fraction form
    422,915.12/634,373.76 = 142,629.20/x
  3. Step 3: Cross multiply
    422,915.12x = 634,373.76 × 142,629.20
  4. Step 4: Simplify right side
    422,915.12x = 90,480,221,889.79
  5. Step 5: Solve for x
    x = 90,480,221,889.79/422,915.12
  6. Step 6: Final answer
    x = 213,944.16

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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.