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Finding the Fourth Proportional to 353,189.20, 530,075.40 and 163,940.80

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Solution

The fourth proportional to 353,189.20, 530,075.40 and 163,940.80 is: 246,046.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,189.20 : 530,075.40 = 163,940.80 : x
  2. Step 2: Convert to fraction form
    353,189.20/530,075.40 = 163,940.80/x
  3. Step 3: Cross multiply
    353,189.20x = 530,075.40 × 163,940.80
  4. Step 4: Simplify right side
    353,189.20x = 86,900,985,136.32
  5. Step 5: Solve for x
    x = 86,900,985,136.32/353,189.20
  6. Step 6: Final answer
    x = 246,046.55

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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.