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Finding the Fourth Proportional to 353,047.80, 487,317.42 and 225,723.90

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Solution

The fourth proportional to 353,047.80, 487,317.42 and 225,723.90 is: 311,570.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,047.80 : 487,317.42 = 225,723.90 : x
  2. Step 2: Convert to fraction form
    353,047.80/487,317.42 = 225,723.90/x
  3. Step 3: Cross multiply
    353,047.80x = 487,317.42 × 225,723.90
  4. Step 4: Simplify right side
    353,047.80x = 109,999,188,580.34
  5. Step 5: Solve for x
    x = 109,999,188,580.34/353,047.80
  6. Step 6: Final answer
    x = 311,570.24

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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.