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Finding the Fourth Proportional to 303,495.35, 455,243.03 and 145,642.55

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Solution

The fourth proportional to 303,495.35, 455,243.03 and 145,642.55 is: 218,463.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,495.35 : 455,243.03 = 145,642.55 : x
  2. Step 2: Convert to fraction form
    303,495.35/455,243.03 = 145,642.55/x
  3. Step 3: Cross multiply
    303,495.35x = 455,243.03 × 145,642.55
  4. Step 4: Simplify right side
    303,495.35x = 66,302,755,030.71
  5. Step 5: Solve for x
    x = 66,302,755,030.71/303,495.35
  6. Step 6: Final answer
    x = 218,463.83

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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.