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Finding the Fourth Proportional to 665,338.38, 997,798.19 and 215,955.47

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Solution

The fourth proportional to 665,338.38, 997,798.19 and 215,955.47 is: 323,865.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,338.38 : 997,798.19 = 215,955.47 : x
  2. Step 2: Convert to fraction form
    665,338.38/997,798.19 = 215,955.47/x
  3. Step 3: Cross multiply
    665,338.38x = 997,798.19 × 215,955.47
  4. Step 4: Simplify right side
    665,338.38x = 215,479,971,017.83
  5. Step 5: Solve for x
    x = 215,479,971,017.83/665,338.38
  6. Step 6: Final answer
    x = 323,865.24

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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.