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Finding the Fourth Proportional to 403,483.40, 603,669.90 and 263,515.40

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Solution

The fourth proportional to 403,483.40, 603,669.90 and 263,515.40 is: 394,257.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,483.40 : 603,669.90 = 263,515.40 : x
  2. Step 2: Convert to fraction form
    403,483.40/603,669.90 = 263,515.40/x
  3. Step 3: Cross multiply
    403,483.40x = 603,669.90 × 263,515.40
  4. Step 4: Simplify right side
    403,483.40x = 159,076,315,166.46
  5. Step 5: Solve for x
    x = 159,076,315,166.46/403,483.40
  6. Step 6: Final answer
    x = 394,257.40

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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.