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Finding the Fourth Proportional to 309,480.37, 427,158.88 and 188,688.26

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Solution

The fourth proportional to 309,480.37, 427,158.88 and 188,688.26 is: 260,436.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,480.37 : 427,158.88 = 188,688.26 : x
  2. Step 2: Convert to fraction form
    309,480.37/427,158.88 = 188,688.26/x
  3. Step 3: Cross multiply
    309,480.37x = 427,158.88 × 188,688.26
  4. Step 4: Simplify right side
    309,480.37x = 80,599,862,731.51
  5. Step 5: Solve for x
    x = 80,599,862,731.51/309,480.37
  6. Step 6: Final answer
    x = 260,436.11

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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.