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Finding the Fourth Proportional to 285,146.01, 393,495.16 and 156,084.39

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Solution

The fourth proportional to 285,146.01, 393,495.16 and 156,084.39 is: 215,392.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,146.01 : 393,495.16 = 156,084.39 : x
  2. Step 2: Convert to fraction form
    285,146.01/393,495.16 = 156,084.39/x
  3. Step 3: Cross multiply
    285,146.01x = 393,495.16 × 156,084.39
  4. Step 4: Simplify right side
    285,146.01x = 61,418,452,016.55
  5. Step 5: Solve for x
    x = 61,418,452,016.55/285,146.01
  6. Step 6: Final answer
    x = 215,392.99

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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.