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Finding the Fourth Proportional to 623.60, 938.99 and 514.96

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Solution

The fourth proportional to 623.60, 938.99 and 514.96 is: 775.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.60 : 938.99 = 514.96 : x
  2. Step 2: Convert to fraction form
    623.60/938.99 = 514.96/x
  3. Step 3: Cross multiply
    623.60x = 938.99 × 514.96
  4. Step 4: Simplify right side
    623.60x = 483,541.23
  5. Step 5: Solve for x
    x = 483,541.23/623.60
  6. Step 6: Final answer
    x = 775.40

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.