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Finding the Fourth Proportional to 2,009.15, 3,012.65 and 621.89

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Solution

The fourth proportional to 2,009.15, 3,012.65 and 621.89 is: 932.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,009.15 : 3,012.65 = 621.89 : x
  2. Step 2: Convert to fraction form
    2,009.15/3,012.65 = 621.89/x
  3. Step 3: Cross multiply
    2,009.15x = 3,012.65 × 621.89
  4. Step 4: Simplify right side
    2,009.15x = 1,873,533.80
  5. Step 5: Solve for x
    x = 1,873,533.80/2,009.15
  6. Step 6: Final answer
    x = 932.50

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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.