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Finding the Fourth Proportional to 420.77, 579.84 and 337.74

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Solution

The fourth proportional to 420.77, 579.84 and 337.74 is: 465.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    420.77 : 579.84 = 337.74 : x
  2. Step 2: Convert to fraction form
    420.77/579.84 = 337.74/x
  3. Step 3: Cross multiply
    420.77x = 579.84 × 337.74
  4. Step 4: Simplify right side
    420.77x = 195,835.16
  5. Step 5: Solve for x
    x = 195,835.16/420.77
  6. Step 6: Final answer
    x = 465.43

Related Problems

Find fourth proportional to 210.38, 289.92 and 168.87
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Double scale
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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.