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Finding the Fourth Proportional to 660,621.60, 911,802.96 and 434,288.16

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Solution

The fourth proportional to 660,621.60, 911,802.96 and 434,288.16 is: 599,413.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,621.60 : 911,802.96 = 434,288.16 : x
  2. Step 2: Convert to fraction form
    660,621.60/911,802.96 = 434,288.16/x
  3. Step 3: Cross multiply
    660,621.60x = 911,802.96 × 434,288.16
  4. Step 4: Simplify right side
    660,621.60x = 395,985,229,780.95
  5. Step 5: Solve for x
    x = 395,985,229,780.95/660,621.60
  6. Step 6: Final answer
    x = 599,413.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.