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Finding the Fourth Proportional to 426,992.64, 640,521.60 and 146,507.52

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Solution

The fourth proportional to 426,992.64, 640,521.60 and 146,507.52 is: 219,772.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,992.64 : 640,521.60 = 146,507.52 : x
  2. Step 2: Convert to fraction form
    426,992.64/640,521.60 = 146,507.52/x
  3. Step 3: Cross multiply
    426,992.64x = 640,521.60 × 146,507.52
  4. Step 4: Simplify right side
    426,992.64x = 93,841,231,122.43
  5. Step 5: Solve for x
    x = 93,841,231,122.43/426,992.64
  6. Step 6: Final answer
    x = 219,772.48

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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.