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Finding the Fourth Proportional to 606.53, 836.28 and 420.18

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Solution

The fourth proportional to 606.53, 836.28 and 420.18 is: 579.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    606.53 : 836.28 = 420.18 : x
  2. Step 2: Convert to fraction form
    606.53/836.28 = 420.18/x
  3. Step 3: Cross multiply
    606.53x = 836.28 × 420.18
  4. Step 4: Simplify right side
    606.53x = 351,388.13
  5. Step 5: Solve for x
    x = 351,388.13/606.53
  6. Step 6: Final answer
    x = 579.35

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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.