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Finding the Fourth Proportional to 489,140.80, 734,075.70 and 252,361.60

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Solution

The fourth proportional to 489,140.80, 734,075.70 and 252,361.60 is: 378,730.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,140.80 : 734,075.70 = 252,361.60 : x
  2. Step 2: Convert to fraction form
    489,140.80/734,075.70 = 252,361.60/x
  3. Step 3: Cross multiply
    489,140.80x = 734,075.70 × 252,361.60
  4. Step 4: Simplify right side
    489,140.80x = 185,252,518,173.12
  5. Step 5: Solve for x
    x = 185,252,518,173.12/489,140.80
  6. Step 6: Final answer
    x = 378,730.46

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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.