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Finding the Fourth Proportional to 443,686.92, 665,030.64 and 218,570.40

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Solution

The fourth proportional to 443,686.92, 665,030.64 and 218,570.40 is: 327,609.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,686.92 : 665,030.64 = 218,570.40 : x
  2. Step 2: Convert to fraction form
    443,686.92/665,030.64 = 218,570.40/x
  3. Step 3: Cross multiply
    443,686.92x = 665,030.64 × 218,570.40
  4. Step 4: Simplify right side
    443,686.92x = 145,356,012,997.06
  5. Step 5: Solve for x
    x = 145,356,012,997.06/443,686.92
  6. Step 6: Final answer
    x = 327,609.42

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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.