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Finding the Fourth Proportional to 523.74, 785.70 and 215.63

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Solution

The fourth proportional to 523.74, 785.70 and 215.63 is: 323.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    523.74 : 785.70 = 215.63 : x
  2. Step 2: Convert to fraction form
    523.74/785.70 = 215.63/x
  3. Step 3: Cross multiply
    523.74x = 785.70 × 215.63
  4. Step 4: Simplify right side
    523.74x = 169,420.49
  5. Step 5: Solve for x
    x = 169,420.49/523.74
  6. Step 6: Final answer
    x = 323.48

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Similar ratio
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1.5x scale

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.