Home / 1,918,047.60-2,880,181.80-1,389,279.60

Finding the Fourth Proportional to 1,918,047.60, 2,880,181.80 and 1,389,279.60

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Solution

The fourth proportional to 1,918,047.60, 2,880,181.80 and 1,389,279.60 is: 2,086,172.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,918,047.60 : 2,880,181.80 = 1,389,279.60 : x
  2. Step 2: Convert to fraction form
    1,918,047.60/2,880,181.80 = 1,389,279.60/x
  3. Step 3: Cross multiply
    1,918,047.60x = 2,880,181.80 × 1,389,279.60
  4. Step 4: Simplify right side
    1,918,047.60x = 4,001,377,819,031.28
  5. Step 5: Solve for x
    x = 4,001,377,819,031.28/1,918,047.60
  6. Step 6: Final answer
    x = 2,086,172.32

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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.