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Finding the Fourth Proportional to 478,309.62, 717,505.68 and 123,320.64

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Solution

The fourth proportional to 478,309.62, 717,505.68 and 123,320.64 is: 184,991.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,309.62 : 717,505.68 = 123,320.64 : x
  2. Step 2: Convert to fraction form
    478,309.62/717,505.68 = 123,320.64/x
  3. Step 3: Cross multiply
    478,309.62x = 717,505.68 × 123,320.64
  4. Step 4: Simplify right side
    478,309.62x = 88,483,259,661.24
  5. Step 5: Solve for x
    x = 88,483,259,661.24/478,309.62
  6. Step 6: Final answer
    x = 184,991.60

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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.