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Finding the Fourth Proportional to 343,638.60, 515,334.30 and 118,938

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Solution

The fourth proportional to 343,638.60, 515,334.30 and 118,938 is: 178,364.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,638.60 : 515,334.30 = 118,938 : x
  2. Step 2: Convert to fraction form
    343,638.60/515,334.30 = 118,938/x
  3. Step 3: Cross multiply
    343,638.60x = 515,334.30 × 118,938
  4. Step 4: Simplify right side
    343,638.60x = 61,292,830,973.40
  5. Step 5: Solve for x
    x = 61,292,830,973.40/343,638.60
  6. Step 6: Final answer
    x = 178,364.22

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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.