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Finding the Fourth Proportional to 285,042.71, 427,688.12 and 178,670.45

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Solution

The fourth proportional to 285,042.71, 427,688.12 and 178,670.45 is: 268,083.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,042.71 : 427,688.12 = 178,670.45 : x
  2. Step 2: Convert to fraction form
    285,042.71/427,688.12 = 178,670.45/x
  3. Step 3: Cross multiply
    285,042.71x = 427,688.12 × 178,670.45
  4. Step 4: Simplify right side
    285,042.71x = 76,415,229,035.92
  5. Step 5: Solve for x
    x = 76,415,229,035.92/285,042.71
  6. Step 6: Final answer
    x = 268,083.43

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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.