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Finding the Fourth Proportional to 649.38, 973.72 and 340.49

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Solution

The fourth proportional to 649.38, 973.72 and 340.49 is: 510.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    649.38 : 973.72 = 340.49 : x
  2. Step 2: Convert to fraction form
    649.38/973.72 = 340.49/x
  3. Step 3: Cross multiply
    649.38x = 973.72 × 340.49
  4. Step 4: Simplify right side
    649.38x = 331,541.92
  5. Step 5: Solve for x
    x = 331,541.92/649.38
  6. Step 6: Final answer
    x = 510.55

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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.