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Finding the Fourth Proportional to 268,953.60, 403,430.40 and 256,706.40

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Solution

The fourth proportional to 268,953.60, 403,430.40 and 256,706.40 is: 385,059.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,953.60 : 403,430.40 = 256,706.40 : x
  2. Step 2: Convert to fraction form
    268,953.60/403,430.40 = 256,706.40/x
  3. Step 3: Cross multiply
    268,953.60x = 403,430.40 × 256,706.40
  4. Step 4: Simplify right side
    268,953.60x = 103,563,165,634.56
  5. Step 5: Solve for x
    x = 103,563,165,634.56/268,953.60
  6. Step 6: Final answer
    x = 385,059.60

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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.