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Finding the Fourth Proportional to 353,443.80, 528,999.30 and 274,128.60

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Solution

The fourth proportional to 353,443.80, 528,999.30 and 274,128.60 is: 410,288.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,443.80 : 528,999.30 = 274,128.60 : x
  2. Step 2: Convert to fraction form
    353,443.80/528,999.30 = 274,128.60/x
  3. Step 3: Cross multiply
    353,443.80x = 528,999.30 × 274,128.60
  4. Step 4: Simplify right side
    353,443.80x = 145,013,837,509.98
  5. Step 5: Solve for x
    x = 145,013,837,509.98/353,443.80
  6. Step 6: Final answer
    x = 410,288.25

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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.