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Finding the Fourth Proportional to 256,017.11, 353,139.14 and 155,415.11

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Solution

The fourth proportional to 256,017.11, 353,139.14 and 155,415.11 is: 214,373.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,017.11 : 353,139.14 = 155,415.11 : x
  2. Step 2: Convert to fraction form
    256,017.11/353,139.14 = 155,415.11/x
  3. Step 3: Cross multiply
    256,017.11x = 353,139.14 × 155,415.11
  4. Step 4: Simplify right side
    256,017.11x = 54,883,156,911.25
  5. Step 5: Solve for x
    x = 54,883,156,911.25/256,017.11
  6. Step 6: Final answer
    x = 214,373.01

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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.