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Finding the Fourth Proportional to 478,887.26, 718,334.48 and 212,576.18

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Solution

The fourth proportional to 478,887.26, 718,334.48 and 212,576.18 is: 318,865.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,887.26 : 718,334.48 = 212,576.18 : x
  2. Step 2: Convert to fraction form
    478,887.26/718,334.48 = 212,576.18/x
  3. Step 3: Cross multiply
    478,887.26x = 718,334.48 × 212,576.18
  4. Step 4: Simplify right side
    478,887.26x = 152,700,799,720.69
  5. Step 5: Solve for x
    x = 152,700,799,720.69/478,887.26
  6. Step 6: Final answer
    x = 318,865.86

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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.