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Finding the Fourth Proportional to 387,554.40, 581,331.60 and 200,930.40

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Solution

The fourth proportional to 387,554.40, 581,331.60 and 200,930.40 is: 301,395.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,554.40 : 581,331.60 = 200,930.40 : x
  2. Step 2: Convert to fraction form
    387,554.40/581,331.60 = 200,930.40/x
  3. Step 3: Cross multiply
    387,554.40x = 581,331.60 × 200,930.40
  4. Step 4: Simplify right side
    387,554.40x = 116,807,190,920.64
  5. Step 5: Solve for x
    x = 116,807,190,920.64/387,554.40
  6. Step 6: Final answer
    x = 301,395.60

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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.