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Finding the Fourth Proportional to 665,014.11, 997,661.46 and 215,700.09

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Solution

The fourth proportional to 665,014.11, 997,661.46 and 215,700.09 is: 323,595.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,014.11 : 997,661.46 = 215,700.09 : x
  2. Step 2: Convert to fraction form
    665,014.11/997,661.46 = 215,700.09/x
  3. Step 3: Cross multiply
    665,014.11x = 997,661.46 × 215,700.09
  4. Step 4: Simplify right side
    665,014.11x = 215,195,666,711.53
  5. Step 5: Solve for x
    x = 215,195,666,711.53/665,014.11
  6. Step 6: Final answer
    x = 323,595.64

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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.