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Finding the Fourth Proportional to 426,745.02, 640,289.66 and 189,925.72

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Solution

The fourth proportional to 426,745.02, 640,289.66 and 189,925.72 is: 284,965.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,745.02 : 640,289.66 = 189,925.72 : x
  2. Step 2: Convert to fraction form
    426,745.02/640,289.66 = 189,925.72/x
  3. Step 3: Cross multiply
    426,745.02x = 640,289.66 × 189,925.72
  4. Step 4: Simplify right side
    426,745.02x = 121,607,474,684.06
  5. Step 5: Solve for x
    x = 121,607,474,684.06/426,745.02
  6. Step 6: Final answer
    x = 284,965.19

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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.