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Finding the Fourth Proportional to 355,659.18, 531,217.40 and 321,873.42

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Solution

The fourth proportional to 355,659.18, 531,217.40 and 321,873.42 is: 480,754.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,659.18 : 531,217.40 = 321,873.42 : x
  2. Step 2: Convert to fraction form
    355,659.18/531,217.40 = 321,873.42/x
  3. Step 3: Cross multiply
    355,659.18x = 531,217.40 × 321,873.42
  4. Step 4: Simplify right side
    355,659.18x = 170,984,759,692.14
  5. Step 5: Solve for x
    x = 170,984,759,692.14/355,659.18
  6. Step 6: Final answer
    x = 480,754.52

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.