Home / 2,990.93-4,486.40-1,430.57

Finding the Fourth Proportional to 2,990.93, 4,486.40 and 1,430.57

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Solution

The fourth proportional to 2,990.93, 4,486.40 and 1,430.57 is: 2,145.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,990.93 : 4,486.40 = 1,430.57 : x
  2. Step 2: Convert to fraction form
    2,990.93/4,486.40 = 1,430.57/x
  3. Step 3: Cross multiply
    2,990.93x = 4,486.40 × 1,430.57
  4. Step 4: Simplify right side
    2,990.93x = 6,418,109.25
  5. Step 5: Solve for x
    x = 6,418,109.25/2,990.93
  6. Step 6: Final answer
    x = 2,145.86

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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.