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Finding the Fourth Proportional to 529,692.91, 730,990.64 and 287,991.75

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Solution

The fourth proportional to 529,692.91, 730,990.64 and 287,991.75 is: 397,436.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,692.91 : 730,990.64 = 287,991.75 : x
  2. Step 2: Convert to fraction form
    529,692.91/730,990.64 = 287,991.75/x
  3. Step 3: Cross multiply
    529,692.91x = 730,990.64 × 287,991.75
  4. Step 4: Simplify right side
    529,692.91x = 210,519,273,647.22
  5. Step 5: Solve for x
    x = 210,519,273,647.22/529,692.91
  6. Step 6: Final answer
    x = 397,436.46

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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.