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Finding the Fourth Proportional to 374,672.80, 561,746.40 and 137,984.80

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Solution

The fourth proportional to 374,672.80, 561,746.40 and 137,984.80 is: 206,880.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    374,672.80 : 561,746.40 = 137,984.80 : x
  2. Step 2: Convert to fraction form
    374,672.80/561,746.40 = 137,984.80/x
  3. Step 3: Cross multiply
    374,672.80x = 561,746.40 × 137,984.80
  4. Step 4: Simplify right side
    374,672.80x = 77,512,464,654.72
  5. Step 5: Solve for x
    x = 77,512,464,654.72/374,672.80
  6. Step 6: Final answer
    x = 206,880.42

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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.