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Finding the Fourth Proportional to 550,651.21, 758,482.81 and 389,228.74

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Solution

The fourth proportional to 550,651.21, 758,482.81 and 389,228.74 is: 536,134.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    550,651.21 : 758,482.81 = 389,228.74 : x
  2. Step 2: Convert to fraction form
    550,651.21/758,482.81 = 389,228.74/x
  3. Step 3: Cross multiply
    550,651.21x = 758,482.81 × 389,228.74
  4. Step 4: Simplify right side
    550,651.21x = 295,223,310,939.85
  5. Step 5: Solve for x
    x = 295,223,310,939.85/550,651.21
  6. Step 6: Final answer
    x = 536,134.86

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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.