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Finding the Fourth Proportional to 445,665.16, 668,147.10 and 220,871.08

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Solution

The fourth proportional to 445,665.16, 668,147.10 and 220,871.08 is: 331,132.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,665.16 : 668,147.10 = 220,871.08 : x
  2. Step 2: Convert to fraction form
    445,665.16/668,147.10 = 220,871.08/x
  3. Step 3: Cross multiply
    445,665.16x = 668,147.10 × 220,871.08
  4. Step 4: Simplify right side
    445,665.16x = 147,574,371,575.87
  5. Step 5: Solve for x
    x = 147,574,371,575.87/445,665.16
  6. Step 6: Final answer
    x = 331,132.84

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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.