Home / 427,987.16-641,979.20-128,466.44

Finding the Fourth Proportional to 427,987.16, 641,979.20 and 128,466.44

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Solution

The fourth proportional to 427,987.16, 641,979.20 and 128,466.44 is: 192,699.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,987.16 : 641,979.20 = 128,466.44 : x
  2. Step 2: Convert to fraction form
    427,987.16/641,979.20 = 128,466.44/x
  3. Step 3: Cross multiply
    427,987.16x = 641,979.20 × 128,466.44
  4. Step 4: Simplify right side
    427,987.16x = 82,472,781,735.72
  5. Step 5: Solve for x
    x = 82,472,781,735.72/427,987.16
  6. Step 6: Final answer
    x = 192,699.20

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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.