Home / 1,109,820.21-1,664,805.54-390,074.43

Finding the Fourth Proportional to 1,109,820.21, 1,664,805.54 and 390,074.43

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Solution

The fourth proportional to 1,109,820.21, 1,664,805.54 and 390,074.43 is: 585,138.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,109,820.21 : 1,664,805.54 = 390,074.43 : x
  2. Step 2: Convert to fraction form
    1,109,820.21/1,664,805.54 = 390,074.43/x
  3. Step 3: Cross multiply
    1,109,820.21x = 1,664,805.54 × 390,074.43
  4. Step 4: Simplify right side
    1,109,820.21x = 649,398,072,076.34
  5. Step 5: Solve for x
    x = 649,398,072,076.34/1,109,820.21
  6. Step 6: Final answer
    x = 585,138.08

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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.