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Finding the Fourth Proportional to 298,763.60, 448,145.40 and 121,276.40

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Solution

The fourth proportional to 298,763.60, 448,145.40 and 121,276.40 is: 181,914.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,763.60 : 448,145.40 = 121,276.40 : x
  2. Step 2: Convert to fraction form
    298,763.60/448,145.40 = 121,276.40/x
  3. Step 3: Cross multiply
    298,763.60x = 448,145.40 × 121,276.40
  4. Step 4: Simplify right side
    298,763.60x = 54,349,460,788.56
  5. Step 5: Solve for x
    x = 54,349,460,788.56/298,763.60
  6. Step 6: Final answer
    x = 181,914.60

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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.