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Finding the Fourth Proportional to 611,157.90, 917,064.90 and 256,207.80

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Solution

The fourth proportional to 611,157.90, 917,064.90 and 256,207.80 is: 384,449.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,157.90 : 917,064.90 = 256,207.80 : x
  2. Step 2: Convert to fraction form
    611,157.90/917,064.90 = 256,207.80/x
  3. Step 3: Cross multiply
    611,157.90x = 917,064.90 × 256,207.80
  4. Step 4: Simplify right side
    611,157.90x = 234,959,180,486.22
  5. Step 5: Solve for x
    x = 234,959,180,486.22/611,157.90
  6. Step 6: Final answer
    x = 384,449.22

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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.