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Finding the Fourth Proportional to 665,014.61, 997,662.21 and 215,700.59

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Solution

The fourth proportional to 665,014.61, 997,662.21 and 215,700.59 is: 323,596.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,014.61 : 997,662.21 = 215,700.59 : x
  2. Step 2: Convert to fraction form
    665,014.61/997,662.21 = 215,700.59/x
  3. Step 3: Cross multiply
    665,014.61x = 997,662.21 × 215,700.59
  4. Step 4: Simplify right side
    665,014.61x = 215,196,326,239.20
  5. Step 5: Solve for x
    x = 215,196,326,239.20/665,014.61
  6. Step 6: Final answer
    x = 323,596.39

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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.