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Finding the Fourth Proportional to 623,310.40, 936,002.40 and 343,028.80

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Solution

The fourth proportional to 623,310.40, 936,002.40 and 343,028.80 is: 515,113.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,310.40 : 936,002.40 = 343,028.80 : x
  2. Step 2: Convert to fraction form
    623,310.40/936,002.40 = 343,028.80/x
  3. Step 3: Cross multiply
    623,310.40x = 936,002.40 × 343,028.80
  4. Step 4: Simplify right side
    623,310.40x = 321,075,780,069.12
  5. Step 5: Solve for x
    x = 321,075,780,069.12/623,310.40
  6. Step 6: Final answer
    x = 515,113.79

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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.