Home / 426,905.73-640,791.90-213,826.32

Finding the Fourth Proportional to 426,905.73, 640,791.90 and 213,826.32

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Solution

The fourth proportional to 426,905.73, 640,791.90 and 213,826.32 is: 320,956.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,905.73 : 640,791.90 = 213,826.32 : x
  2. Step 2: Convert to fraction form
    426,905.73/640,791.90 = 213,826.32/x
  3. Step 3: Cross multiply
    426,905.73x = 640,791.90 × 213,826.32
  4. Step 4: Simplify right side
    426,905.73x = 137,018,176,266.42
  5. Step 5: Solve for x
    x = 137,018,176,266.42/426,905.73
  6. Step 6: Final answer
    x = 320,956.52

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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.