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Finding the Fourth Proportional to 889.34, 1,227.31 and 496.35

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Solution

The fourth proportional to 889.34, 1,227.31 and 496.35 is: 684.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.34 : 1,227.31 = 496.35 : x
  2. Step 2: Convert to fraction form
    889.34/1,227.31 = 496.35/x
  3. Step 3: Cross multiply
    889.34x = 1,227.31 × 496.35
  4. Step 4: Simplify right side
    889.34x = 609,174.08
  5. Step 5: Solve for x
    x = 609,174.08/889.34
  6. Step 6: Final answer
    x = 684.98

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1.5x scale

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.