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Finding the Fourth Proportional to 873,266.40, 1,309,640.40 and 340,480.80

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Solution

The fourth proportional to 873,266.40, 1,309,640.40 and 340,480.80 is: 510,620.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    873,266.40 : 1,309,640.40 = 340,480.80 : x
  2. Step 2: Convert to fraction form
    873,266.40/1,309,640.40 = 340,480.80/x
  3. Step 3: Cross multiply
    873,266.40x = 1,309,640.40 × 340,480.80
  4. Step 4: Simplify right side
    873,266.40x = 445,907,411,104.32
  5. Step 5: Solve for x
    x = 445,907,411,104.32/873,266.40
  6. Step 6: Final answer
    x = 510,620.14

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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.