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Finding the Fourth Proportional to 654.64, 974.52 and 623.20

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Solution

The fourth proportional to 654.64, 974.52 and 623.20 is: 927.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    654.64 : 974.52 = 623.20 : x
  2. Step 2: Convert to fraction form
    654.64/974.52 = 623.20/x
  3. Step 3: Cross multiply
    654.64x = 974.52 × 623.20
  4. Step 4: Simplify right side
    654.64x = 607,320.86
  5. Step 5: Solve for x
    x = 607,320.86/654.64
  6. Step 6: Final answer
    x = 927.72

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.