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Finding the Fourth Proportional to 890.07, 1,228.59 and 540.75

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Solution

The fourth proportional to 890.07, 1,228.59 and 540.75 is: 746.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    890.07 : 1,228.59 = 540.75 : x
  2. Step 2: Convert to fraction form
    890.07/1,228.59 = 540.75/x
  3. Step 3: Cross multiply
    890.07x = 1,228.59 × 540.75
  4. Step 4: Simplify right side
    890.07x = 664,360.04
  5. Step 5: Solve for x
    x = 664,360.04/890.07
  6. Step 6: Final answer
    x = 746.41

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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.