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Finding the Fourth Proportional to 500,069.45, 690,090.45 and 270,621.66

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Solution

The fourth proportional to 500,069.45, 690,090.45 and 270,621.66 is: 373,454.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,069.45 : 690,090.45 = 270,621.66 : x
  2. Step 2: Convert to fraction form
    500,069.45/690,090.45 = 270,621.66/x
  3. Step 3: Cross multiply
    500,069.45x = 690,090.45 × 270,621.66
  4. Step 4: Simplify right side
    500,069.45x = 186,753,423,129.15
  5. Step 5: Solve for x
    x = 186,753,423,129.15/500,069.45
  6. Step 6: Final answer
    x = 373,454.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.