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Finding the Fourth Proportional to 259,742.40, 389,613.60 and 189,758.40

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Solution

The fourth proportional to 259,742.40, 389,613.60 and 189,758.40 is: 284,637.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,742.40 : 389,613.60 = 189,758.40 : x
  2. Step 2: Convert to fraction form
    259,742.40/389,613.60 = 189,758.40/x
  3. Step 3: Cross multiply
    259,742.40x = 389,613.60 × 189,758.40
  4. Step 4: Simplify right side
    259,742.40x = 73,932,453,354.24
  5. Step 5: Solve for x
    x = 73,932,453,354.24/259,742.40
  6. Step 6: Final answer
    x = 284,637.60

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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.