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Finding the Fourth Proportional to 303,763.40, 455,774.70 and 145,910.60

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Solution

The fourth proportional to 303,763.40, 455,774.70 and 145,910.60 is: 218,928.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,763.40 : 455,774.70 = 145,910.60 : x
  2. Step 2: Convert to fraction form
    303,763.40/455,774.70 = 145,910.60/x
  3. Step 3: Cross multiply
    303,763.40x = 455,774.70 × 145,910.60
  4. Step 4: Simplify right side
    303,763.40x = 66,502,359,941.82
  5. Step 5: Solve for x
    x = 66,502,359,941.82/303,763.40
  6. Step 6: Final answer
    x = 218,928.15

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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.