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Finding the Fourth Proportional to 611,154.90, 917,060.40 and 256,204.80

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Solution

The fourth proportional to 611,154.90, 917,060.40 and 256,204.80 is: 384,444.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,154.90 : 917,060.40 = 256,204.80 : x
  2. Step 2: Convert to fraction form
    611,154.90/917,060.40 = 256,204.80/x
  3. Step 3: Cross multiply
    611,154.90x = 917,060.40 × 256,204.80
  4. Step 4: Simplify right side
    611,154.90x = 234,955,276,369.92
  5. Step 5: Solve for x
    x = 234,955,276,369.92/611,154.90
  6. Step 6: Final answer
    x = 384,444.72

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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.