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Finding the Fourth Proportional to 612,092.90, 917,811.30 and 256,705.40

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Solution

The fourth proportional to 612,092.90, 917,811.30 and 256,705.40 is: 384,920.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,092.90 : 917,811.30 = 256,705.40 : x
  2. Step 2: Convert to fraction form
    612,092.90/917,811.30 = 256,705.40/x
  3. Step 3: Cross multiply
    612,092.90x = 917,811.30 × 256,705.40
  4. Step 4: Simplify right side
    612,092.90x = 235,607,116,891.02
  5. Step 5: Solve for x
    x = 235,607,116,891.02/612,092.90
  6. Step 6: Final answer
    x = 384,920.52

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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.