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Finding the Fourth Proportional to 611,034.90, 916,880.40 and 256,084.80

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Solution

The fourth proportional to 611,034.90, 916,880.40 and 256,084.80 is: 384,264.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,034.90 : 916,880.40 = 256,084.80 : x
  2. Step 2: Convert to fraction form
    611,034.90/916,880.40 = 256,084.80/x
  3. Step 3: Cross multiply
    611,034.90x = 916,880.40 × 256,084.80
  4. Step 4: Simplify right side
    611,034.90x = 234,799,133,857.92
  5. Step 5: Solve for x
    x = 234,799,133,857.92/611,034.90
  6. Step 6: Final answer
    x = 384,264.69

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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.