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Finding the Fourth Proportional to 665,010.15, 997,655.43 and 215,696.07

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Solution

The fourth proportional to 665,010.15, 997,655.43 and 215,696.07 is: 323,589.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,010.15 : 997,655.43 = 215,696.07 : x
  2. Step 2: Convert to fraction form
    665,010.15/997,655.43 = 215,696.07/x
  3. Step 3: Cross multiply
    665,010.15x = 997,655.43 × 215,696.07
  4. Step 4: Simplify right side
    665,010.15x = 215,190,355,465.16
  5. Step 5: Solve for x
    x = 215,190,355,465.16/665,010.15
  6. Step 6: Final answer
    x = 323,589.58

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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.