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Finding the Fourth Proportional to 288,931.20, 433,267.20 and 111,379.20

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Solution

The fourth proportional to 288,931.20, 433,267.20 and 111,379.20 is: 167,018.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,931.20 : 433,267.20 = 111,379.20 : x
  2. Step 2: Convert to fraction form
    288,931.20/433,267.20 = 111,379.20/x
  3. Step 3: Cross multiply
    288,931.20x = 433,267.20 × 111,379.20
  4. Step 4: Simplify right side
    288,931.20x = 48,256,954,122.24
  5. Step 5: Solve for x
    x = 48,256,954,122.24/288,931.20
  6. Step 6: Final answer
    x = 167,018.84

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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.