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Finding the Fourth Proportional to 2,073.61, 3,109.35 and 612.58

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Solution

The fourth proportional to 2,073.61, 3,109.35 and 612.58 is: 918.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,073.61 : 3,109.35 = 612.58 : x
  2. Step 2: Convert to fraction form
    2,073.61/3,109.35 = 612.58/x
  3. Step 3: Cross multiply
    2,073.61x = 3,109.35 × 612.58
  4. Step 4: Simplify right side
    2,073.61x = 1,904,725.62
  5. Step 5: Solve for x
    x = 1,904,725.62/2,073.61
  6. Step 6: Final answer
    x = 918.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.