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Finding the Fourth Proportional to 366,877.20, 513,978 and 366,877.20

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Solution

The fourth proportional to 366,877.20, 513,978 and 366,877.20 is: 513,978

Step by Step Solution

  1. Step 1: Write the proportion equation
    366,877.20 : 513,978 = 366,877.20 : x
  2. Step 2: Convert to fraction form
    366,877.20/513,978 = 366,877.20/x
  3. Step 3: Cross multiply
    366,877.20x = 513,978 × 366,877.20
  4. Step 4: Simplify right side
    366,877.20x = 188,566,809,501.60
  5. Step 5: Solve for x
    x = 188,566,809,501.60/366,877.20
  6. Step 6: Final answer
    x = 513,978

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.