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Finding the Fourth Proportional to 285,431.50, 393,895.50 and 158,115.34

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Solution

The fourth proportional to 285,431.50, 393,895.50 and 158,115.34 is: 218,199.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,431.50 : 393,895.50 = 158,115.34 : x
  2. Step 2: Convert to fraction form
    285,431.50/393,895.50 = 158,115.34/x
  3. Step 3: Cross multiply
    285,431.50x = 393,895.50 × 158,115.34
  4. Step 4: Simplify right side
    285,431.50x = 62,280,920,906.97
  5. Step 5: Solve for x
    x = 62,280,920,906.97/285,431.50
  6. Step 6: Final answer
    x = 218,199.19

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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.