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Finding the Fourth Proportional to 478,539.36, 717,971.88 and 300,838.32

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Solution

The fourth proportional to 478,539.36, 717,971.88 and 300,838.32 is: 451,359.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,539.36 : 717,971.88 = 300,838.32 : x
  2. Step 2: Convert to fraction form
    478,539.36/717,971.88 = 300,838.32/x
  3. Step 3: Cross multiply
    478,539.36x = 717,971.88 × 300,838.32
  4. Step 4: Simplify right side
    478,539.36x = 215,993,454,186.44
  5. Step 5: Solve for x
    x = 215,993,454,186.44/478,539.36
  6. Step 6: Final answer
    x = 451,359.85

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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.