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Finding the Fourth Proportional to 400,908.48, 601,373.28 and 134,678.40

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Solution

The fourth proportional to 400,908.48, 601,373.28 and 134,678.40 is: 202,021.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,908.48 : 601,373.28 = 134,678.40 : x
  2. Step 2: Convert to fraction form
    400,908.48/601,373.28 = 134,678.40/x
  3. Step 3: Cross multiply
    400,908.48x = 601,373.28 × 134,678.40
  4. Step 4: Simplify right side
    400,908.48x = 80,991,991,153.15
  5. Step 5: Solve for x
    x = 80,991,991,153.15/400,908.48
  6. Step 6: Final answer
    x = 202,021.15

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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.