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Finding the Fourth Proportional to 546,986.40, 820,090.80 and 209,896.80

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Solution

The fourth proportional to 546,986.40, 820,090.80 and 209,896.80 is: 314,696.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    546,986.40 : 820,090.80 = 209,896.80 : x
  2. Step 2: Convert to fraction form
    546,986.40/820,090.80 = 209,896.80/x
  3. Step 3: Cross multiply
    546,986.40x = 820,090.80 × 209,896.80
  4. Step 4: Simplify right side
    546,986.40x = 172,134,434,629.44
  5. Step 5: Solve for x
    x = 172,134,434,629.44/546,986.40
  6. Step 6: Final answer
    x = 314,696.00

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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.