Home / 2,990.68-4,487.00-1,117.55

Finding the Fourth Proportional to 2,990.68, 4,487.00 and 1,117.55

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Solution

The fourth proportional to 2,990.68, 4,487.00 and 1,117.55 is: 1,676.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,990.68 : 4,487.00 = 1,117.55 : x
  2. Step 2: Convert to fraction form
    2,990.68/4,487.00 = 1,117.55/x
  3. Step 3: Cross multiply
    2,990.68x = 4,487.00 × 1,117.55
  4. Step 4: Simplify right side
    2,990.68x = 5,014,455.63
  5. Step 5: Solve for x
    x = 5,014,455.63/2,990.68
  6. Step 6: Final answer
    x = 1,676.69

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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.