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Finding the Fourth Proportional to 656,820.56, 906,413.74 and 355,014.56

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Solution

The fourth proportional to 656,820.56, 906,413.74 and 355,014.56 is: 489,920.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,820.56 : 906,413.74 = 355,014.56 : x
  2. Step 2: Convert to fraction form
    656,820.56/906,413.74 = 355,014.56/x
  3. Step 3: Cross multiply
    656,820.56x = 906,413.74 × 355,014.56
  4. Step 4: Simplify right side
    656,820.56x = 321,790,075,084.05
  5. Step 5: Solve for x
    x = 321,790,075,084.05/656,820.56
  6. Step 6: Final answer
    x = 489,920.83

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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.