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Finding the Fourth Proportional to 478,308.72, 717,500.16 and 193,863.90

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Solution

The fourth proportional to 478,308.72, 717,500.16 and 193,863.90 is: 290,810.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,308.72 : 717,500.16 = 193,863.90 : x
  2. Step 2: Convert to fraction form
    478,308.72/717,500.16 = 193,863.90/x
  3. Step 3: Cross multiply
    478,308.72x = 717,500.16 × 193,863.90
  4. Step 4: Simplify right side
    478,308.72x = 139,097,379,268.22
  5. Step 5: Solve for x
    x = 139,097,379,268.22/478,308.72
  6. Step 6: Final answer
    x = 290,810.88

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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.