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Finding the Fourth Proportional to 426,327.40, 640,614.30 and 236,938.60

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Solution

The fourth proportional to 426,327.40, 640,614.30 and 236,938.60 is: 356,032.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,327.40 : 640,614.30 = 236,938.60 : x
  2. Step 2: Convert to fraction form
    426,327.40/640,614.30 = 236,938.60/x
  3. Step 3: Cross multiply
    426,327.40x = 640,614.30 × 236,938.60
  4. Step 4: Simplify right side
    426,327.40x = 151,786,255,381.98
  5. Step 5: Solve for x
    x = 151,786,255,381.98/426,327.40
  6. Step 6: Final answer
    x = 356,032.14

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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.