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Finding the Fourth Proportional to 303,629.40, 455,364.45 and 90,339.93

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Solution

The fourth proportional to 303,629.40, 455,364.45 and 90,339.93 is: 135,486.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,629.40 : 455,364.45 = 90,339.93 : x
  2. Step 2: Convert to fraction form
    303,629.40/455,364.45 = 90,339.93/x
  3. Step 3: Cross multiply
    303,629.40x = 455,364.45 × 90,339.93
  4. Step 4: Simplify right side
    303,629.40x = 41,137,592,537.49
  5. Step 5: Solve for x
    x = 41,137,592,537.49/303,629.40
  6. Step 6: Final answer
    x = 135,486.20

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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.