Home / 2,990.07-4,126.40-1,663.79

Finding the Fourth Proportional to 2,990.07, 4,126.40 and 1,663.79

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Solution

The fourth proportional to 2,990.07, 4,126.40 and 1,663.79 is: 2,296.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,990.07 : 4,126.40 = 1,663.79 : x
  2. Step 2: Convert to fraction form
    2,990.07/4,126.40 = 1,663.79/x
  3. Step 3: Cross multiply
    2,990.07x = 4,126.40 × 1,663.79
  4. Step 4: Simplify right side
    2,990.07x = 6,865,434.11
  5. Step 5: Solve for x
    x = 6,865,434.11/2,990.07
  6. Step 6: Final answer
    x = 2,296.08

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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.