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Finding the Fourth Proportional to 520,075.50, 717,708.51 and 281,611.50

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Solution

The fourth proportional to 520,075.50, 717,708.51 and 281,611.50 is: 388,626.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,075.50 : 717,708.51 = 281,611.50 : x
  2. Step 2: Convert to fraction form
    520,075.50/717,708.51 = 281,611.50/x
  3. Step 3: Cross multiply
    520,075.50x = 717,708.51 × 281,611.50
  4. Step 4: Simplify right side
    520,075.50x = 202,114,970,063.87
  5. Step 5: Solve for x
    x = 202,114,970,063.87/520,075.50
  6. Step 6: Final answer
    x = 388,626.21

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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.