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Finding the Fourth Proportional to 388,430.40, 582,664.80 and 201,806.40

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Solution

The fourth proportional to 388,430.40, 582,664.80 and 201,806.40 is: 302,719.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,430.40 : 582,664.80 = 201,806.40 : x
  2. Step 2: Convert to fraction form
    388,430.40/582,664.80 = 201,806.40/x
  3. Step 3: Cross multiply
    388,430.40x = 582,664.80 × 201,806.40
  4. Step 4: Simplify right side
    388,430.40x = 117,585,485,694.72
  5. Step 5: Solve for x
    x = 117,585,485,694.72/388,430.40
  6. Step 6: Final answer
    x = 302,719.58

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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.