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Finding the Fourth Proportional to 217,813.80, 326,720.70 and 143,164.20

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Solution

The fourth proportional to 217,813.80, 326,720.70 and 143,164.20 is: 214,746.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,813.80 : 326,720.70 = 143,164.20 : x
  2. Step 2: Convert to fraction form
    217,813.80/326,720.70 = 143,164.20/x
  3. Step 3: Cross multiply
    217,813.80x = 326,720.70 × 143,164.20
  4. Step 4: Simplify right side
    217,813.80x = 46,774,707,638.94
  5. Step 5: Solve for x
    x = 46,774,707,638.94/217,813.80
  6. Step 6: Final answer
    x = 214,746.30

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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.