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Finding the Fourth Proportional to 285,141.34, 393,468.39 and 170,397.21

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Solution

The fourth proportional to 285,141.34, 393,468.39 and 170,397.21 is: 235,132.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,141.34 : 393,468.39 = 170,397.21 : x
  2. Step 2: Convert to fraction form
    285,141.34/393,468.39 = 170,397.21/x
  3. Step 3: Cross multiply
    285,141.34x = 393,468.39 × 170,397.21
  4. Step 4: Simplify right side
    285,141.34x = 67,045,915,879.19
  5. Step 5: Solve for x
    x = 67,045,915,879.19/285,141.34
  6. Step 6: Final answer
    x = 235,132.22

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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.