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Finding the Fourth Proportional to 655,609.20, 983,413.80 and 578,626.80

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Solution

The fourth proportional to 655,609.20, 983,413.80 and 578,626.80 is: 867,940.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    655,609.20 : 983,413.80 = 578,626.80 : x
  2. Step 2: Convert to fraction form
    655,609.20/983,413.80 = 578,626.80/x
  3. Step 3: Cross multiply
    655,609.20x = 983,413.80 × 578,626.80
  4. Step 4: Simplify right side
    655,609.20x = 569,029,580,169.84
  5. Step 5: Solve for x
    x = 569,029,580,169.84/655,609.20
  6. Step 6: Final answer
    x = 867,940.20

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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.