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Finding the Fourth Proportional to 478,610.80, 717,664.68 and 212,256.16

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Solution

The fourth proportional to 478,610.80, 717,664.68 and 212,256.16 is: 318,272.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,610.80 : 717,664.68 = 212,256.16 : x
  2. Step 2: Convert to fraction form
    478,610.80/717,664.68 = 212,256.16/x
  3. Step 3: Cross multiply
    478,610.80x = 717,664.68 × 212,256.16
  4. Step 4: Simplify right side
    478,610.80x = 152,328,749,144.43
  5. Step 5: Solve for x
    x = 152,328,749,144.43/478,610.80
  6. Step 6: Final answer
    x = 318,272.69

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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.