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Finding the Fourth Proportional to 326,868.40, 490,302.60 and 149,721.40

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Solution

The fourth proportional to 326,868.40, 490,302.60 and 149,721.40 is: 224,582.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,868.40 : 490,302.60 = 149,721.40 : x
  2. Step 2: Convert to fraction form
    326,868.40/490,302.60 = 149,721.40/x
  3. Step 3: Cross multiply
    326,868.40x = 490,302.60 × 149,721.40
  4. Step 4: Simplify right side
    326,868.40x = 73,408,791,695.64
  5. Step 5: Solve for x
    x = 73,408,791,695.64/326,868.40
  6. Step 6: Final answer
    x = 224,582.10

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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.