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Finding the Fourth Proportional to 393,240, 589,860 and 130,584

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Solution

The fourth proportional to 393,240, 589,860 and 130,584 is: 195,876

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,240 : 589,860 = 130,584 : x
  2. Step 2: Convert to fraction form
    393,240/589,860 = 130,584/x
  3. Step 3: Cross multiply
    393,240x = 589,860 × 130,584
  4. Step 4: Simplify right side
    393,240x = 77,026,278,240
  5. Step 5: Solve for x
    x = 77,026,278,240/393,240
  6. Step 6: Final answer
    x = 195,876

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.