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Finding the Fourth Proportional to 219,239.80, 328,859.70 and 143,132.20

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Solution

The fourth proportional to 219,239.80, 328,859.70 and 143,132.20 is: 214,698.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,239.80 : 328,859.70 = 143,132.20 : x
  2. Step 2: Convert to fraction form
    219,239.80/328,859.70 = 143,132.20/x
  3. Step 3: Cross multiply
    219,239.80x = 328,859.70 × 143,132.20
  4. Step 4: Simplify right side
    219,239.80x = 47,070,412,352.34
  5. Step 5: Solve for x
    x = 47,070,412,352.34/219,239.80
  6. Step 6: Final answer
    x = 214,698.30

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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.