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Finding the Fourth Proportional to 478,505.43, 717,720.46 and 208,627.20

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Solution

The fourth proportional to 478,505.43, 717,720.46 and 208,627.20 is: 312,924.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,505.43 : 717,720.46 = 208,627.20 : x
  2. Step 2: Convert to fraction form
    478,505.43/717,720.46 = 208,627.20/x
  3. Step 3: Cross multiply
    478,505.43x = 717,720.46 × 208,627.20
  4. Step 4: Simplify right side
    478,505.43x = 149,736,009,430.94
  5. Step 5: Solve for x
    x = 149,736,009,430.94/478,505.43
  6. Step 6: Final answer
    x = 312,924.37

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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.