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Finding the Fourth Proportional to 289,832.80, 434,749.20 and 132,368.80

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Solution

The fourth proportional to 289,832.80, 434,749.20 and 132,368.80 is: 198,553.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,832.80 : 434,749.20 = 132,368.80 : x
  2. Step 2: Convert to fraction form
    289,832.80/434,749.20 = 132,368.80/x
  3. Step 3: Cross multiply
    289,832.80x = 434,749.20 × 132,368.80
  4. Step 4: Simplify right side
    289,832.80x = 57,547,229,904.96
  5. Step 5: Solve for x
    x = 57,547,229,904.96/289,832.80
  6. Step 6: Final answer
    x = 198,553.20

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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.