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Finding the Fourth Proportional to 257,312.66, 355,111.17 and 161,901.14

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Solution

The fourth proportional to 257,312.66, 355,111.17 and 161,901.14 is: 223,435.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,312.66 : 355,111.17 = 161,901.14 : x
  2. Step 2: Convert to fraction form
    257,312.66/355,111.17 = 161,901.14/x
  3. Step 3: Cross multiply
    257,312.66x = 355,111.17 × 161,901.14
  4. Step 4: Simplify right side
    257,312.66x = 57,492,903,249.73
  5. Step 5: Solve for x
    x = 57,492,903,249.73/257,312.66
  6. Step 6: Final answer
    x = 223,435.97

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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.