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Finding the Fourth Proportional to 730.92, 1,008.92 and 612.66

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Solution

The fourth proportional to 730.92, 1,008.92 and 612.66 is: 845.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    730.92 : 1,008.92 = 612.66 : x
  2. Step 2: Convert to fraction form
    730.92/1,008.92 = 612.66/x
  3. Step 3: Cross multiply
    730.92x = 1,008.92 × 612.66
  4. Step 4: Simplify right side
    730.92x = 618,124.93
  5. Step 5: Solve for x
    x = 618,124.93/730.92
  6. Step 6: Final answer
    x = 845.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.