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Finding the Fourth Proportional to 651.40, 899.00 and 356.71

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Solution

The fourth proportional to 651.40, 899.00 and 356.71 is: 492.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.40 : 899.00 = 356.71 : x
  2. Step 2: Convert to fraction form
    651.40/899.00 = 356.71/x
  3. Step 3: Cross multiply
    651.40x = 899.00 × 356.71
  4. Step 4: Simplify right side
    651.40x = 320,682.75
  5. Step 5: Solve for x
    x = 320,682.75/651.40
  6. Step 6: Final answer
    x = 492.30

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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.