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Finding the Fourth Proportional to 256,645.40, 354,160.49 and 141,916.59

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Solution

The fourth proportional to 256,645.40, 354,160.49 and 141,916.59 is: 195,839.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,645.40 : 354,160.49 = 141,916.59 : x
  2. Step 2: Convert to fraction form
    256,645.40/354,160.49 = 141,916.59/x
  3. Step 3: Cross multiply
    256,645.40x = 354,160.49 × 141,916.59
  4. Step 4: Simplify right side
    256,645.40x = 50,261,248,343.95
  5. Step 5: Solve for x
    x = 50,261,248,343.95/256,645.40
  6. Step 6: Final answer
    x = 195,839.28

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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.