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Finding the Fourth Proportional to 219,992.40, 330,118.20 and 145,328.40

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Solution

The fourth proportional to 219,992.40, 330,118.20 and 145,328.40 is: 218,078.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,992.40 : 330,118.20 = 145,328.40 : x
  2. Step 2: Convert to fraction form
    219,992.40/330,118.20 = 145,328.40/x
  3. Step 3: Cross multiply
    219,992.40x = 330,118.20 × 145,328.40
  4. Step 4: Simplify right side
    219,992.40x = 47,975,549,816.88
  5. Step 5: Solve for x
    x = 47,975,549,816.88/219,992.40
  6. Step 6: Final answer
    x = 218,078.21

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1.5x scale

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.