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Finding the Fourth Proportional to 644.97, 890.07 and 365.19

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Solution

The fourth proportional to 644.97, 890.07 and 365.19 is: 503.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    644.97 : 890.07 = 365.19 : x
  2. Step 2: Convert to fraction form
    644.97/890.07 = 365.19/x
  3. Step 3: Cross multiply
    644.97x = 890.07 × 365.19
  4. Step 4: Simplify right side
    644.97x = 325,044.66
  5. Step 5: Solve for x
    x = 325,044.66/644.97
  6. Step 6: Final answer
    x = 503.97

Related Problems

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Half scale
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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.