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Finding the Fourth Proportional to 624,038.40, 936,460.80 and 343,756.80

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Solution

The fourth proportional to 624,038.40, 936,460.80 and 343,756.80 is: 515,857.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    624,038.40 : 936,460.80 = 343,756.80 : x
  2. Step 2: Convert to fraction form
    624,038.40/936,460.80 = 343,756.80/x
  3. Step 3: Cross multiply
    624,038.40x = 936,460.80 × 343,756.80
  4. Step 4: Simplify right side
    624,038.40x = 321,914,767,933.44
  5. Step 5: Solve for x
    x = 321,914,767,933.44/624,038.40
  6. Step 6: Final answer
    x = 515,857.31

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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.