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Finding the Fourth Proportional to 572,268, 789,729.84 and 317,621.01

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Solution

The fourth proportional to 572,268, 789,729.84 and 317,621.01 is: 438,316.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,268 : 789,729.84 = 317,621.01 : x
  2. Step 2: Convert to fraction form
    572,268/789,729.84 = 317,621.01/x
  3. Step 3: Cross multiply
    572,268x = 789,729.84 × 317,621.01
  4. Step 4: Simplify right side
    572,268x = 250,834,789,407.94
  5. Step 5: Solve for x
    x = 250,834,789,407.94/572,268
  6. Step 6: Final answer
    x = 438,316.99

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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.