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Finding the Fourth Proportional to 330,688.51, 495,942.64 and 90,745.52

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Solution

The fourth proportional to 330,688.51, 495,942.64 and 90,745.52 is: 136,093.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,688.51 : 495,942.64 = 90,745.52 : x
  2. Step 2: Convert to fraction form
    330,688.51/495,942.64 = 90,745.52/x
  3. Step 3: Cross multiply
    330,688.51x = 495,942.64 × 90,745.52
  4. Step 4: Simplify right side
    330,688.51x = 45,004,572,756.97
  5. Step 5: Solve for x
    x = 45,004,572,756.97/330,688.51
  6. Step 6: Final answer
    x = 136,093.55

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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.