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Finding the Fourth Proportional to 900.98, 1,243.37 and 502.63

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Solution

The fourth proportional to 900.98, 1,243.37 and 502.63 is: 693.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    900.98 : 1,243.37 = 502.63 : x
  2. Step 2: Convert to fraction form
    900.98/1,243.37 = 502.63/x
  3. Step 3: Cross multiply
    900.98x = 1,243.37 × 502.63
  4. Step 4: Simplify right side
    900.98x = 624,952.55
  5. Step 5: Solve for x
    x = 624,952.55/900.98
  6. Step 6: Final answer
    x = 693.64

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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.