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Finding the Fourth Proportional to 478,837.31, 718,266.91 and 141,871.64

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Solution

The fourth proportional to 478,837.31, 718,266.91 and 141,871.64 is: 212,810.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,837.31 : 718,266.91 = 141,871.64 : x
  2. Step 2: Convert to fraction form
    478,837.31/718,266.91 = 141,871.64/x
  3. Step 3: Cross multiply
    478,837.31x = 718,266.91 × 141,871.64
  4. Step 4: Simplify right side
    478,837.31x = 101,901,705,920.42
  5. Step 5: Solve for x
    x = 101,901,705,920.42/478,837.31
  6. Step 6: Final answer
    x = 212,810.70

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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.