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Finding the Fourth Proportional to 612.86, 913.89 and 607.38

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Solution

The fourth proportional to 612.86, 913.89 and 607.38 is: 905.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.86 : 913.89 = 607.38 : x
  2. Step 2: Convert to fraction form
    612.86/913.89 = 607.38/x
  3. Step 3: Cross multiply
    612.86x = 913.89 × 607.38
  4. Step 4: Simplify right side
    612.86x = 555,078.51
  5. Step 5: Solve for x
    x = 555,078.51/612.86
  6. Step 6: Final answer
    x = 905.73

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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.