Home / 285,143.26-393,471-170,399.06

Finding the Fourth Proportional to 285,143.26, 393,471 and 170,399.06

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Solution

The fourth proportional to 285,143.26, 393,471 and 170,399.06 is: 235,134.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,143.26 : 393,471 = 170,399.06 : x
  2. Step 2: Convert to fraction form
    285,143.26/393,471 = 170,399.06/x
  3. Step 3: Cross multiply
    285,143.26x = 393,471 × 170,399.06
  4. Step 4: Simplify right side
    285,143.26x = 67,047,088,537.26
  5. Step 5: Solve for x
    x = 67,047,088,537.26/285,143.26
  6. Step 6: Final answer
    x = 235,134.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.