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Finding the Fourth Proportional to 623.97, 935.06 and 315.63

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Solution

The fourth proportional to 623.97, 935.06 and 315.63 is: 472.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.97 : 935.06 = 315.63 : x
  2. Step 2: Convert to fraction form
    623.97/935.06 = 315.63/x
  3. Step 3: Cross multiply
    623.97x = 935.06 × 315.63
  4. Step 4: Simplify right side
    623.97x = 295,131.41
  5. Step 5: Solve for x
    x = 295,131.41/623.97
  6. Step 6: Final answer
    x = 472.99

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Double scale
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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.