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Finding the Fourth Proportional to 531,990.12, 734,144.81 and 290,271

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Solution

The fourth proportional to 531,990.12, 734,144.81 and 290,271 is: 400,573.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    531,990.12 : 734,144.81 = 290,271 : x
  2. Step 2: Convert to fraction form
    531,990.12/734,144.81 = 290,271/x
  3. Step 3: Cross multiply
    531,990.12x = 734,144.81 × 290,271
  4. Step 4: Simplify right side
    531,990.12x = 213,100,946,692.16
  5. Step 5: Solve for x
    x = 213,100,946,692.16/531,990.12
  6. Step 6: Final answer
    x = 400,573.13

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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.