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Finding the Fourth Proportional to 606.79, 837.03 and 420.39

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Solution

The fourth proportional to 606.79, 837.03 and 420.39 is: 579.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    606.79 : 837.03 = 420.39 : x
  2. Step 2: Convert to fraction form
    606.79/837.03 = 420.39/x
  3. Step 3: Cross multiply
    606.79x = 837.03 × 420.39
  4. Step 4: Simplify right side
    606.79x = 351,880.62
  5. Step 5: Solve for x
    x = 351,880.62/606.79
  6. Step 6: Final answer
    x = 579.90

Related Problems

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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.