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Finding the Fourth Proportional to 285,138.84, 393,464.94 and 170,394.71

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Solution

The fourth proportional to 285,138.84, 393,464.94 and 170,394.71 is: 235,128.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,138.84 : 393,464.94 = 170,394.71 : x
  2. Step 2: Convert to fraction form
    285,138.84/393,464.94 = 170,394.71/x
  3. Step 3: Cross multiply
    285,138.84x = 393,464.94 × 170,394.71
  4. Step 4: Simplify right side
    285,138.84x = 67,044,343,215.66
  5. Step 5: Solve for x
    x = 67,044,343,215.66/285,138.84
  6. Step 6: Final answer
    x = 235,128.77

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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.