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Finding the Fourth Proportional to 434.06, 649.72 and 303.45

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Solution

The fourth proportional to 434.06, 649.72 and 303.45 is: 454.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    434.06 : 649.72 = 303.45 : x
  2. Step 2: Convert to fraction form
    434.06/649.72 = 303.45/x
  3. Step 3: Cross multiply
    434.06x = 649.72 × 303.45
  4. Step 4: Simplify right side
    434.06x = 197,155.48
  5. Step 5: Solve for x
    x = 197,155.48/434.06
  6. Step 6: Final answer
    x = 454.21

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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.