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Finding the Fourth Proportional to 315,692.72, 435,685.96 and 172,474.28

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Solution

The fourth proportional to 315,692.72, 435,685.96 and 172,474.28 is: 238,030.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,692.72 : 435,685.96 = 172,474.28 : x
  2. Step 2: Convert to fraction form
    315,692.72/435,685.96 = 172,474.28/x
  3. Step 3: Cross multiply
    315,692.72x = 435,685.96 × 172,474.28
  4. Step 4: Simplify right side
    315,692.72x = 75,144,622,257.11
  5. Step 5: Solve for x
    x = 75,144,622,257.11/315,692.72
  6. Step 6: Final answer
    x = 238,030.90

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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.