Home / 721,312.79-1,082,067.66-300,490.25

Finding the Fourth Proportional to 721,312.79, 1,082,067.66 and 300,490.25

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Solution

The fourth proportional to 721,312.79, 1,082,067.66 and 300,490.25 is: 450,776.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,312.79 : 1,082,067.66 = 300,490.25 : x
  2. Step 2: Convert to fraction form
    721,312.79/1,082,067.66 = 300,490.25/x
  3. Step 3: Cross multiply
    721,312.79x = 1,082,067.66 × 300,490.25
  4. Step 4: Simplify right side
    721,312.79x = 325,150,781,670.32
  5. Step 5: Solve for x
    x = 325,150,781,670.32/721,312.79
  6. Step 6: Final answer
    x = 450,776.40

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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.