Home / 721,814.40-1,082,721.60-384,724.80

Finding the Fourth Proportional to 721,814.40, 1,082,721.60 and 384,724.80

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Solution

The fourth proportional to 721,814.40, 1,082,721.60 and 384,724.80 is: 577,087.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,814.40 : 1,082,721.60 = 384,724.80 : x
  2. Step 2: Convert to fraction form
    721,814.40/1,082,721.60 = 384,724.80/x
  3. Step 3: Cross multiply
    721,814.40x = 1,082,721.60 × 384,724.80
  4. Step 4: Simplify right side
    721,814.40x = 416,549,851,015.68
  5. Step 5: Solve for x
    x = 416,549,851,015.68/721,814.40
  6. Step 6: Final answer
    x = 577,087.20

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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.