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Finding the Fourth Proportional to 478,625.12, 718,104.72 and 319,338.08

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Solution

The fourth proportional to 478,625.12, 718,104.72 and 319,338.08 is: 479,118.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,625.12 : 718,104.72 = 319,338.08 : x
  2. Step 2: Convert to fraction form
    478,625.12/718,104.72 = 319,338.08/x
  3. Step 3: Cross multiply
    478,625.12x = 718,104.72 × 319,338.08
  4. Step 4: Simplify right side
    478,625.12x = 229,318,182,523.74
  5. Step 5: Solve for x
    x = 229,318,182,523.74/478,625.12
  6. Step 6: Final answer
    x = 479,118.57

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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.