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Finding the Fourth Proportional to 553,582.48, 763,147.56 and 394,330

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Solution

The fourth proportional to 553,582.48, 763,147.56 and 394,330 is: 543,608.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,582.48 : 763,147.56 = 394,330 : x
  2. Step 2: Convert to fraction form
    553,582.48/763,147.56 = 394,330/x
  3. Step 3: Cross multiply
    553,582.48x = 763,147.56 × 394,330
  4. Step 4: Simplify right side
    553,582.48x = 300,931,977,334.80
  5. Step 5: Solve for x
    x = 300,931,977,334.80/553,582.48
  6. Step 6: Final answer
    x = 543,608.20

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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.