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Finding the Fourth Proportional to 393,856.80, 590,007.60 and 235,615.20

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Solution

The fourth proportional to 393,856.80, 590,007.60 and 235,615.20 is: 352,957.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,856.80 : 590,007.60 = 235,615.20 : x
  2. Step 2: Convert to fraction form
    393,856.80/590,007.60 = 235,615.20/x
  3. Step 3: Cross multiply
    393,856.80x = 590,007.60 × 235,615.20
  4. Step 4: Simplify right side
    393,856.80x = 139,014,758,675.52
  5. Step 5: Solve for x
    x = 139,014,758,675.52/393,856.80
  6. Step 6: Final answer
    x = 352,957.62

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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.