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Finding the Fourth Proportional to 256,384.80, 384,644.40 and 98,618.40

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Solution

The fourth proportional to 256,384.80, 384,644.40 and 98,618.40 is: 147,953.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,384.80 : 384,644.40 = 98,618.40 : x
  2. Step 2: Convert to fraction form
    256,384.80/384,644.40 = 98,618.40/x
  3. Step 3: Cross multiply
    256,384.80x = 384,644.40 × 98,618.40
  4. Step 4: Simplify right side
    256,384.80x = 37,933,015,296.96
  5. Step 5: Solve for x
    x = 37,933,015,296.96/256,384.80
  6. Step 6: Final answer
    x = 147,953.45

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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.