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Finding the Fourth Proportional to 308,312.56, 425,539.97 and 187,428.25

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Solution

The fourth proportional to 308,312.56, 425,539.97 and 187,428.25 is: 258,692.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,312.56 : 425,539.97 = 187,428.25 : x
  2. Step 2: Convert to fraction form
    308,312.56/425,539.97 = 187,428.25/x
  3. Step 3: Cross multiply
    308,312.56x = 425,539.97 × 187,428.25
  4. Step 4: Simplify right side
    308,312.56x = 79,758,211,882.15
  5. Step 5: Solve for x
    x = 79,758,211,882.15/308,312.56
  6. Step 6: Final answer
    x = 258,692.71

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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.