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Finding the Fourth Proportional to 478,310.61, 717,507.18 and 123,321.63

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Solution

The fourth proportional to 478,310.61, 717,507.18 and 123,321.63 is: 184,993.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,310.61 : 717,507.18 = 123,321.63 : x
  2. Step 2: Convert to fraction form
    478,310.61/717,507.18 = 123,321.63/x
  3. Step 3: Cross multiply
    478,310.61x = 717,507.18 × 123,321.63
  4. Step 4: Simplify right side
    478,310.61x = 88,484,154,974.30
  5. Step 5: Solve for x
    x = 88,484,154,974.30/478,310.61
  6. Step 6: Final answer
    x = 184,993.08

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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.