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Finding the Fourth Proportional to 219,128.40, 328,500.60 and 148,779.60

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Solution

The fourth proportional to 219,128.40, 328,500.60 and 148,779.60 is: 223,039.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,128.40 : 328,500.60 = 148,779.60 : x
  2. Step 2: Convert to fraction form
    219,128.40/328,500.60 = 148,779.60/x
  3. Step 3: Cross multiply
    219,128.40x = 328,500.60 × 148,779.60
  4. Step 4: Simplify right side
    219,128.40x = 48,874,187,867.76
  5. Step 5: Solve for x
    x = 48,874,187,867.76/219,128.40
  6. Step 6: Final answer
    x = 223,039.04

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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.