Home / 427,037.58-640,582.79-142,753.71

Finding the Fourth Proportional to 427,037.58, 640,582.79 and 142,753.71

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Solution

The fourth proportional to 427,037.58, 640,582.79 and 142,753.71 is: 214,139.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,037.58 : 640,582.79 = 142,753.71 : x
  2. Step 2: Convert to fraction form
    427,037.58/640,582.79 = 142,753.71/x
  3. Step 3: Cross multiply
    427,037.58x = 640,582.79 × 142,753.71
  4. Step 4: Simplify right side
    427,037.58x = 91,445,569,120.88
  5. Step 5: Solve for x
    x = 91,445,569,120.88/427,037.58
  6. Step 6: Final answer
    x = 214,139.40

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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.