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Finding the Fourth Proportional to 443,805.60, 666,145.80 and 219,419.40

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Solution

The fourth proportional to 443,805.60, 666,145.80 and 219,419.40 is: 329,345.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,805.60 : 666,145.80 = 219,419.40 : x
  2. Step 2: Convert to fraction form
    443,805.60/666,145.80 = 219,419.40/x
  3. Step 3: Cross multiply
    443,805.60x = 666,145.80 × 219,419.40
  4. Step 4: Simplify right side
    443,805.60x = 146,165,311,748.52
  5. Step 5: Solve for x
    x = 146,165,311,748.52/443,805.60
  6. Step 6: Final answer
    x = 329,345.35

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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.