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Finding the Fourth Proportional to 308,505.39, 425,768.85 and 187,655.01

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Solution

The fourth proportional to 308,505.39, 425,768.85 and 187,655.01 is: 258,983.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,505.39 : 425,768.85 = 187,655.01 : x
  2. Step 2: Convert to fraction form
    308,505.39/425,768.85 = 187,655.01/x
  3. Step 3: Cross multiply
    308,505.39x = 425,768.85 × 187,655.01
  4. Step 4: Simplify right side
    308,505.39x = 79,897,657,804.44
  5. Step 5: Solve for x
    x = 79,897,657,804.44/308,505.39
  6. Step 6: Final answer
    x = 258,983.02

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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.