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Finding the Fourth Proportional to 611,413.60, 917,339.10 and 256,536.40

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Solution

The fourth proportional to 611,413.60, 917,339.10 and 256,536.40 is: 384,896.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,413.60 : 917,339.10 = 256,536.40 : x
  2. Step 2: Convert to fraction form
    611,413.60/917,339.10 = 256,536.40/x
  3. Step 3: Cross multiply
    611,413.60x = 917,339.10 × 256,536.40
  4. Step 4: Simplify right side
    611,413.60x = 235,330,870,293.24
  5. Step 5: Solve for x
    x = 235,330,870,293.24/611,413.60
  6. Step 6: Final answer
    x = 384,896.36

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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.