Home / 2,861.40-4,292.42-913.16

Finding the Fourth Proportional to 2,861.40, 4,292.42 and 913.16

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Solution

The fourth proportional to 2,861.40, 4,292.42 and 913.16 is: 1,369.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,861.40 : 4,292.42 = 913.16 : x
  2. Step 2: Convert to fraction form
    2,861.40/4,292.42 = 913.16/x
  3. Step 3: Cross multiply
    2,861.40x = 4,292.42 × 913.16
  4. Step 4: Simplify right side
    2,861.40x = 3,919,666.25
  5. Step 5: Solve for x
    x = 3,919,666.25/2,861.40
  6. Step 6: Final answer
    x = 1,369.84

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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.