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Finding the Fourth Proportional to 611,577.90, 917,038.80 and 256,190.40

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Solution

The fourth proportional to 611,577.90, 917,038.80 and 256,190.40 is: 384,148.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,577.90 : 917,038.80 = 256,190.40 : x
  2. Step 2: Convert to fraction form
    611,577.90/917,038.80 = 256,190.40/x
  3. Step 3: Cross multiply
    611,577.90x = 917,038.80 × 256,190.40
  4. Step 4: Simplify right side
    611,577.90x = 234,936,536,987.52
  5. Step 5: Solve for x
    x = 234,936,536,987.52/611,577.90
  6. Step 6: Final answer
    x = 384,148.18

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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.