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Finding the Fourth Proportional to 278,892, 385,884.27 and 243,156.42

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Solution

The fourth proportional to 278,892, 385,884.27 and 243,156.42 is: 336,439.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,892 : 385,884.27 = 243,156.42 : x
  2. Step 2: Convert to fraction form
    278,892/385,884.27 = 243,156.42/x
  3. Step 3: Cross multiply
    278,892x = 385,884.27 × 243,156.42
  4. Step 4: Simplify right side
    278,892x = 93,830,237,627.51
  5. Step 5: Solve for x
    x = 93,830,237,627.51/278,892
  6. Step 6: Final answer
    x = 336,439.33

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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.