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Finding the Fourth Proportional to 890.06, 1,228.22 and 517.02

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Solution

The fourth proportional to 890.06, 1,228.22 and 517.02 is: 713.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    890.06 : 1,228.22 = 517.02 : x
  2. Step 2: Convert to fraction form
    890.06/1,228.22 = 517.02/x
  3. Step 3: Cross multiply
    890.06x = 1,228.22 × 517.02
  4. Step 4: Simplify right side
    890.06x = 635,014.30
  5. Step 5: Solve for x
    x = 635,014.30/890.06
  6. Step 6: Final answer
    x = 713.45

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Double scale
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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.