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Finding the Fourth Proportional to 529,474.68, 730,692.72 and 311,643.90

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Solution

The fourth proportional to 529,474.68, 730,692.72 and 311,643.90 is: 430,078.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,474.68 : 730,692.72 = 311,643.90 : x
  2. Step 2: Convert to fraction form
    529,474.68/730,692.72 = 311,643.90/x
  3. Step 3: Cross multiply
    529,474.68x = 730,692.72 × 311,643.90
  4. Step 4: Simplify right side
    529,474.68x = 227,715,928,962.41
  5. Step 5: Solve for x
    x = 227,715,928,962.41/529,474.68
  6. Step 6: Final answer
    x = 430,078.98

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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.