Home / 2,990.14-4,485.09-1,042.78

Finding the Fourth Proportional to 2,990.14, 4,485.09 and 1,042.78

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Solution

The fourth proportional to 2,990.14, 4,485.09 and 1,042.78 is: 1,564.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,990.14 : 4,485.09 = 1,042.78 : x
  2. Step 2: Convert to fraction form
    2,990.14/4,485.09 = 1,042.78/x
  3. Step 3: Cross multiply
    2,990.14x = 4,485.09 × 1,042.78
  4. Step 4: Simplify right side
    2,990.14x = 4,676,962.15
  5. Step 5: Solve for x
    x = 4,676,962.15/2,990.14
  6. Step 6: Final answer
    x = 1,564.13

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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.