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Finding the Fourth Proportional to 257,387.31, 355,074.35 and 161,946.63

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Solution

The fourth proportional to 257,387.31, 355,074.35 and 161,946.63 is: 223,410.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,387.31 : 355,074.35 = 161,946.63 : x
  2. Step 2: Convert to fraction form
    257,387.31/355,074.35 = 161,946.63/x
  3. Step 3: Cross multiply
    257,387.31x = 355,074.35 × 161,946.63
  4. Step 4: Simplify right side
    257,387.31x = 57,503,094,381.94
  5. Step 5: Solve for x
    x = 57,503,094,381.94/257,387.31
  6. Step 6: Final answer
    x = 223,410.76

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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.