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Finding the Fourth Proportional to 478,849.80, 718,274.70 and 212,327.40

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Solution

The fourth proportional to 478,849.80, 718,274.70 and 212,327.40 is: 318,491.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,849.80 : 718,274.70 = 212,327.40 : x
  2. Step 2: Convert to fraction form
    478,849.80/718,274.70 = 212,327.40/x
  3. Step 3: Cross multiply
    478,849.80x = 718,274.70 × 212,327.40
  4. Step 4: Simplify right side
    478,849.80x = 152,509,399,536.78
  5. Step 5: Solve for x
    x = 152,509,399,536.78/478,849.80
  6. Step 6: Final answer
    x = 318,491.10

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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.