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Finding the Fourth Proportional to 256,759.02, 385,138.20 and 98,876.76

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Solution

The fourth proportional to 256,759.02, 385,138.20 and 98,876.76 is: 148,315.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,759.02 : 385,138.20 = 98,876.76 : x
  2. Step 2: Convert to fraction form
    256,759.02/385,138.20 = 98,876.76/x
  3. Step 3: Cross multiply
    256,759.02x = 385,138.20 × 98,876.76
  4. Step 4: Simplify right side
    256,759.02x = 38,081,217,368.23
  5. Step 5: Solve for x
    x = 38,081,217,368.23/256,759.02
  6. Step 6: Final answer
    x = 148,315.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.