Home / 5,215.40-7,824.35-1,705.42

Finding the Fourth Proportional to 5,215.40, 7,824.35 and 1,705.42

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Solution

The fourth proportional to 5,215.40, 7,824.35 and 1,705.42 is: 2,558.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,215.40 : 7,824.35 = 1,705.42 : x
  2. Step 2: Convert to fraction form
    5,215.40/7,824.35 = 1,705.42/x
  3. Step 3: Cross multiply
    5,215.40x = 7,824.35 × 1,705.42
  4. Step 4: Simplify right side
    5,215.40x = 13,343,807.43
  5. Step 5: Solve for x
    x = 13,343,807.43/5,215.40
  6. Step 6: Final answer
    x = 2,558.54

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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.