Home / 309,480.25-427,158.70-188,688.13

Finding the Fourth Proportional to 309,480.25, 427,158.70 and 188,688.13

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Solution

The fourth proportional to 309,480.25, 427,158.70 and 188,688.13 is: 260,435.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,480.25 : 427,158.70 = 188,688.13 : x
  2. Step 2: Convert to fraction form
    309,480.25/427,158.70 = 188,688.13/x
  3. Step 3: Cross multiply
    309,480.25x = 427,158.70 × 188,688.13
  4. Step 4: Simplify right side
    309,480.25x = 80,599,776,787.95
  5. Step 5: Solve for x
    x = 80,599,776,787.95/309,480.25
  6. Step 6: Final answer
    x = 260,435.93

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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.