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Finding the Fourth Proportional to 478,838.31, 718,268.41 and 141,872.64

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Solution

The fourth proportional to 478,838.31, 718,268.41 and 141,872.64 is: 212,812.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,838.31 : 718,268.41 = 141,872.64 : x
  2. Step 2: Convert to fraction form
    478,838.31/718,268.41 = 141,872.64/x
  3. Step 3: Cross multiply
    478,838.31x = 718,268.41 × 141,872.64
  4. Step 4: Simplify right side
    478,838.31x = 101,902,635,555.30
  5. Step 5: Solve for x
    x = 101,902,635,555.30/478,838.31
  6. Step 6: Final answer
    x = 212,812.20

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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.