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Finding the Fourth Proportional to 656,902.21, 906,525.31 and 355,096.21

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Solution

The fourth proportional to 656,902.21, 906,525.31 and 355,096.21 is: 490,032.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,902.21 : 906,525.31 = 355,096.21 : x
  2. Step 2: Convert to fraction form
    656,902.21/906,525.31 = 355,096.21/x
  3. Step 3: Cross multiply
    656,902.21x = 906,525.31 × 355,096.21
  4. Step 4: Simplify right side
    656,902.21x = 321,903,701,850.08
  5. Step 5: Solve for x
    x = 321,903,701,850.08/656,902.21
  6. Step 6: Final answer
    x = 490,032.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.