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Finding the Fourth Proportional to 303,988.56, 455,903.40 and 90,706.32

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Solution

The fourth proportional to 303,988.56, 455,903.40 and 90,706.32 is: 136,035.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,988.56 : 455,903.40 = 90,706.32 : x
  2. Step 2: Convert to fraction form
    303,988.56/455,903.40 = 90,706.32/x
  3. Step 3: Cross multiply
    303,988.56x = 455,903.40 × 90,706.32
  4. Step 4: Simplify right side
    303,988.56x = 41,353,319,689.49
  5. Step 5: Solve for x
    x = 41,353,319,689.49/303,988.56
  6. Step 6: Final answer
    x = 136,035.78

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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.