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Finding the Fourth Proportional to 484.78, 669.00 and 285.62

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Solution

The fourth proportional to 484.78, 669.00 and 285.62 is: 394.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    484.78 : 669.00 = 285.62 : x
  2. Step 2: Convert to fraction form
    484.78/669.00 = 285.62/x
  3. Step 3: Cross multiply
    484.78x = 669.00 × 285.62
  4. Step 4: Simplify right side
    484.78x = 191,075.01
  5. Step 5: Solve for x
    x = 191,075.01/484.78
  6. Step 6: Final answer
    x = 394.15

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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.