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Finding the Fourth Proportional to 297,291.75, 446,005.76 and 128,840.35

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Solution

The fourth proportional to 297,291.75, 446,005.76 and 128,840.35 is: 193,290.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    297,291.75 : 446,005.76 = 128,840.35 : x
  2. Step 2: Convert to fraction form
    297,291.75/446,005.76 = 128,840.35/x
  3. Step 3: Cross multiply
    297,291.75x = 446,005.76 × 128,840.35
  4. Step 4: Simplify right side
    297,291.75x = 57,463,538,220.42
  5. Step 5: Solve for x
    x = 57,463,538,220.42/297,291.75
  6. Step 6: Final answer
    x = 193,290.05

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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.