Home / 1,121,621.10-1,682,431.65-722,712.30

Finding the Fourth Proportional to 1,121,621.10, 1,682,431.65 and 722,712.30

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Solution

The fourth proportional to 1,121,621.10, 1,682,431.65 and 722,712.30 is: 1,084,068.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,121,621.10 : 1,682,431.65 = 722,712.30 : x
  2. Step 2: Convert to fraction form
    1,121,621.10/1,682,431.65 = 722,712.30/x
  3. Step 3: Cross multiply
    1,121,621.10x = 1,682,431.65 × 722,712.30
  4. Step 4: Simplify right side
    1,121,621.10x = 1,215,914,047,364.30
  5. Step 5: Solve for x
    x = 1,215,914,047,364.30/1,121,621.10
  6. Step 6: Final answer
    x = 1,084,068.45

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Double scale
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Similar ratio
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1.5x scale

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.