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Finding the Fourth Proportional to 479,621.80, 719,691.90 and 213,423.40

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Solution

The fourth proportional to 479,621.80, 719,691.90 and 213,423.40 is: 320,250.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,621.80 : 719,691.90 = 213,423.40 : x
  2. Step 2: Convert to fraction form
    479,621.80/719,691.90 = 213,423.40/x
  3. Step 3: Cross multiply
    479,621.80x = 719,691.90 × 213,423.40
  4. Step 4: Simplify right side
    479,621.80x = 153,599,092,250.46
  5. Step 5: Solve for x
    x = 153,599,092,250.46/479,621.80
  6. Step 6: Final answer
    x = 320,250.44

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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.