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Finding the Fourth Proportional to 274,406.40, 411,868.80 and 169,430.40

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Solution

The fourth proportional to 274,406.40, 411,868.80 and 169,430.40 is: 254,305.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    274,406.40 : 411,868.80 = 169,430.40 : x
  2. Step 2: Convert to fraction form
    274,406.40/411,868.80 = 169,430.40/x
  3. Step 3: Cross multiply
    274,406.40x = 411,868.80 × 169,430.40
  4. Step 4: Simplify right side
    274,406.40x = 69,783,095,531.52
  5. Step 5: Solve for x
    x = 69,783,095,531.52/274,406.40
  6. Step 6: Final answer
    x = 254,305.64

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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.