Home / 2,990.02-4,126.12-1,663.78

Finding the Fourth Proportional to 2,990.02, 4,126.12 and 1,663.78

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Solution

The fourth proportional to 2,990.02, 4,126.12 and 1,663.78 is: 2,295.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,990.02 : 4,126.12 = 1,663.78 : x
  2. Step 2: Convert to fraction form
    2,990.02/4,126.12 = 1,663.78/x
  3. Step 3: Cross multiply
    2,990.02x = 4,126.12 × 1,663.78
  4. Step 4: Simplify right side
    2,990.02x = 6,864,955.93
  5. Step 5: Solve for x
    x = 6,864,955.93/2,990.02
  6. Step 6: Final answer
    x = 2,295.96

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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.