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Finding the Fourth Proportional to 426,941.40, 640,412.10 and 131,453.40

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Solution

The fourth proportional to 426,941.40, 640,412.10 and 131,453.40 is: 197,180.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,941.40 : 640,412.10 = 131,453.40 : x
  2. Step 2: Convert to fraction form
    426,941.40/640,412.10 = 131,453.40/x
  3. Step 3: Cross multiply
    426,941.40x = 640,412.10 × 131,453.40
  4. Step 4: Simplify right side
    426,941.40x = 84,184,347,946.14
  5. Step 5: Solve for x
    x = 84,184,347,946.14/426,941.40
  6. Step 6: Final answer
    x = 197,180.10

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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.