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Finding the Fourth Proportional to 298,645.80, 447,968.70 and 265,986.60

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Solution

The fourth proportional to 298,645.80, 447,968.70 and 265,986.60 is: 398,979.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,645.80 : 447,968.70 = 265,986.60 : x
  2. Step 2: Convert to fraction form
    298,645.80/447,968.70 = 265,986.60/x
  3. Step 3: Cross multiply
    298,645.80x = 447,968.70 × 265,986.60
  4. Step 4: Simplify right side
    298,645.80x = 119,153,671,419.42
  5. Step 5: Solve for x
    x = 119,153,671,419.42/298,645.80
  6. Step 6: Final answer
    x = 398,979.90

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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.