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Finding the Fourth Proportional to 658,422, 908,622.36 and 356,616

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Solution

The fourth proportional to 658,422, 908,622.36 and 356,616 is: 492,130.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,422 : 908,622.36 = 356,616 : x
  2. Step 2: Convert to fraction form
    658,422/908,622.36 = 356,616/x
  3. Step 3: Cross multiply
    658,422x = 908,622.36 × 356,616
  4. Step 4: Simplify right side
    658,422x = 324,029,271,533.76
  5. Step 5: Solve for x
    x = 324,029,271,533.76/658,422
  6. Step 6: Final answer
    x = 492,130.08

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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.