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Finding the Fourth Proportional to 303,635.40, 455,373.45 and 90,345.93

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Solution

The fourth proportional to 303,635.40, 455,373.45 and 90,345.93 is: 135,495.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,635.40 : 455,373.45 = 90,345.93 : x
  2. Step 2: Convert to fraction form
    303,635.40/455,373.45 = 90,345.93/x
  3. Step 3: Cross multiply
    303,635.40x = 455,373.45 × 90,345.93
  4. Step 4: Simplify right side
    303,635.40x = 41,141,137,837.56
  5. Step 5: Solve for x
    x = 41,141,137,837.56/303,635.40
  6. Step 6: Final answer
    x = 135,495.20

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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.