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Finding the Fourth Proportional to 572,405.43, 789,888.61 and 317,740.22

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Solution

The fourth proportional to 572,405.43, 789,888.61 and 317,740.22 is: 438,464.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,405.43 : 789,888.61 = 317,740.22 : x
  2. Step 2: Convert to fraction form
    572,405.43/789,888.61 = 317,740.22/x
  3. Step 3: Cross multiply
    572,405.43x = 789,888.61 × 317,740.22
  4. Step 4: Simplify right side
    572,405.43x = 250,979,380,126.71
  5. Step 5: Solve for x
    x = 250,979,380,126.71/572,405.43
  6. Step 6: Final answer
    x = 438,464.36

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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.