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Finding the Fourth Proportional to 606.28, 909.96 and 390.10

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Solution

The fourth proportional to 606.28, 909.96 and 390.10 is: 585.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    606.28 : 909.96 = 390.10 : x
  2. Step 2: Convert to fraction form
    606.28/909.96 = 390.10/x
  3. Step 3: Cross multiply
    606.28x = 909.96 × 390.10
  4. Step 4: Simplify right side
    606.28x = 354,975.40
  5. Step 5: Solve for x
    x = 354,975.40/606.28
  6. Step 6: Final answer
    x = 585.50

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Double scale
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Similar ratio
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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.