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Finding the Fourth Proportional to 442,078.40, 663,117.60 and 393,089.60

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Solution

The fourth proportional to 442,078.40, 663,117.60 and 393,089.60 is: 589,634.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,078.40 : 663,117.60 = 393,089.60 : x
  2. Step 2: Convert to fraction form
    442,078.40/663,117.60 = 393,089.60/x
  3. Step 3: Cross multiply
    442,078.40x = 663,117.60 × 393,089.60
  4. Step 4: Simplify right side
    442,078.40x = 260,664,632,136.96
  5. Step 5: Solve for x
    x = 260,664,632,136.96/442,078.40
  6. Step 6: Final answer
    x = 589,634.40

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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.