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Finding the Fourth Proportional to 298,402.60, 447,603.90 and 120,915.40

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Solution

The fourth proportional to 298,402.60, 447,603.90 and 120,915.40 is: 181,373.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,402.60 : 447,603.90 = 120,915.40 : x
  2. Step 2: Convert to fraction form
    298,402.60/447,603.90 = 120,915.40/x
  3. Step 3: Cross multiply
    298,402.60x = 447,603.90 × 120,915.40
  4. Step 4: Simplify right side
    298,402.60x = 54,122,204,610.06
  5. Step 5: Solve for x
    x = 54,122,204,610.06/298,402.60
  6. Step 6: Final answer
    x = 181,373.10

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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.