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Finding the Fourth Proportional to 2,990.47, 4,127.00 and 1,811.65

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Solution

The fourth proportional to 2,990.47, 4,127.00 and 1,811.65 is: 2,500.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,990.47 : 4,127.00 = 1,811.65 : x
  2. Step 2: Convert to fraction form
    2,990.47/4,127.00 = 1,811.65/x
  3. Step 3: Cross multiply
    2,990.47x = 4,127.00 × 1,811.65
  4. Step 4: Simplify right side
    2,990.47x = 7,476,670.49
  5. Step 5: Solve for x
    x = 7,476,670.49/2,990.47
  6. Step 6: Final answer
    x = 2,500.17

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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.