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Finding the Fourth Proportional to 305,537.88, 421,526.55 and 225,157.13

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Solution

The fourth proportional to 305,537.88, 421,526.55 and 225,157.13 is: 310,631.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,537.88 : 421,526.55 = 225,157.13 : x
  2. Step 2: Convert to fraction form
    305,537.88/421,526.55 = 225,157.13/x
  3. Step 3: Cross multiply
    305,537.88x = 421,526.55 × 225,157.13
  4. Step 4: Simplify right side
    305,537.88x = 94,909,708,216.80
  5. Step 5: Solve for x
    x = 94,909,708,216.80/305,537.88
  6. Step 6: Final answer
    x = 310,631.56

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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.