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Finding the Fourth Proportional to 716,898.05, 989,413.78 and 430,436.59

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Solution

The fourth proportional to 716,898.05, 989,413.78 and 430,436.59 is: 594,059.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,898.05 : 989,413.78 = 430,436.59 : x
  2. Step 2: Convert to fraction form
    716,898.05/989,413.78 = 430,436.59/x
  3. Step 3: Cross multiply
    716,898.05x = 989,413.78 × 430,436.59
  4. Step 4: Simplify right side
    716,898.05x = 425,879,891,626.72
  5. Step 5: Solve for x
    x = 425,879,891,626.72/716,898.05
  6. Step 6: Final answer
    x = 594,059.21

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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.