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Finding the Fourth Proportional to 623.62, 929.62 and 612.69

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Solution

The fourth proportional to 623.62, 929.62 and 612.69 is: 913.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.62 : 929.62 = 612.69 : x
  2. Step 2: Convert to fraction form
    623.62/929.62 = 612.69/x
  3. Step 3: Cross multiply
    623.62x = 929.62 × 612.69
  4. Step 4: Simplify right side
    623.62x = 569,568.88
  5. Step 5: Solve for x
    x = 569,568.88/623.62
  6. Step 6: Final answer
    x = 913.33

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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.