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Finding the Fourth Proportional to 623.70, 935.55 and 620.10

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Solution

The fourth proportional to 623.70, 935.55 and 620.10 is: 930.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.70 : 935.55 = 620.10 : x
  2. Step 2: Convert to fraction form
    623.70/935.55 = 620.10/x
  3. Step 3: Cross multiply
    623.70x = 935.55 × 620.10
  4. Step 4: Simplify right side
    623.70x = 580,134.56
  5. Step 5: Solve for x
    x = 580,134.56/623.70
  6. Step 6: Final answer
    x = 930.15

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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.