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Finding the Fourth Proportional to 610,997.20, 916,225.16 and 326,618.86

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Solution

The fourth proportional to 610,997.20, 916,225.16 and 326,618.86 is: 489,783.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    610,997.20 : 916,225.16 = 326,618.86 : x
  2. Step 2: Convert to fraction form
    610,997.20/916,225.16 = 326,618.86/x
  3. Step 3: Cross multiply
    610,997.20x = 916,225.16 × 326,618.86
  4. Step 4: Simplify right side
    610,997.20x = 299,256,417,262.52
  5. Step 5: Solve for x
    x = 299,256,417,262.52/610,997.20
  6. Step 6: Final answer
    x = 489,783.61

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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.