Home / 1,078,310.40-1,616,428.80-838,291.20

Finding the Fourth Proportional to 1,078,310.40, 1,616,428.80 and 838,291.20

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Solution

The fourth proportional to 1,078,310.40, 1,616,428.80 and 838,291.20 is: 1,256,630.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,078,310.40 : 1,616,428.80 = 838,291.20 : x
  2. Step 2: Convert to fraction form
    1,078,310.40/1,616,428.80 = 838,291.20/x
  3. Step 3: Cross multiply
    1,078,310.40x = 1,616,428.80 × 838,291.20
  4. Step 4: Simplify right side
    1,078,310.40x = 1,355,038,038,466.56
  5. Step 5: Solve for x
    x = 1,355,038,038,466.56/1,078,310.40
  6. Step 6: Final answer
    x = 1,256,630.78

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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.