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Finding the Fourth Proportional to 572,394.36, 789,941 and 330,687.12

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Solution

The fourth proportional to 572,394.36, 789,941 and 330,687.12 is: 456,369.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,394.36 : 789,941 = 330,687.12 : x
  2. Step 2: Convert to fraction form
    572,394.36/789,941 = 330,687.12/x
  3. Step 3: Cross multiply
    572,394.36x = 789,941 × 330,687.12
  4. Step 4: Simplify right side
    572,394.36x = 261,223,314,259.92
  5. Step 5: Solve for x
    x = 261,223,314,259.92/572,394.36
  6. Step 6: Final answer
    x = 456,369.48

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.