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Finding the Fourth Proportional to 665.90, 998.85 and 601.10

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Solution

The fourth proportional to 665.90, 998.85 and 601.10 is: 901.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.90 : 998.85 = 601.10 : x
  2. Step 2: Convert to fraction form
    665.90/998.85 = 601.10/x
  3. Step 3: Cross multiply
    665.90x = 998.85 × 601.10
  4. Step 4: Simplify right side
    665.90x = 600,408.74
  5. Step 5: Solve for x
    x = 600,408.74/665.90
  6. Step 6: Final answer
    x = 901.65

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.