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Finding the Fourth Proportional to 529,692.66, 730,990.29 and 287,991.50

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Solution

The fourth proportional to 529,692.66, 730,990.29 and 287,991.50 is: 397,436.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,692.66 : 730,990.29 = 287,991.50 : x
  2. Step 2: Convert to fraction form
    529,692.66/730,990.29 = 287,991.50/x
  3. Step 3: Cross multiply
    529,692.66x = 730,990.29 × 287,991.50
  4. Step 4: Simplify right side
    529,692.66x = 210,518,986,447.58
  5. Step 5: Solve for x
    x = 210,518,986,447.58/529,692.66
  6. Step 6: Final answer
    x = 397,436.10

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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.