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Finding the Fourth Proportional to 623.55, 935.36 and 315.05

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Solution

The fourth proportional to 623.55, 935.36 and 315.05 is: 472.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.55 : 935.36 = 315.05 : x
  2. Step 2: Convert to fraction form
    623.55/935.36 = 315.05/x
  3. Step 3: Cross multiply
    623.55x = 935.36 × 315.05
  4. Step 4: Simplify right side
    623.55x = 294,678.92
  5. Step 5: Solve for x
    x = 294,678.92/623.55
  6. Step 6: Final answer
    x = 472.58

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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.