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Finding the Fourth Proportional to 368,439.80, 552,951.30 and 143,907.80

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Solution

The fourth proportional to 368,439.80, 552,951.30 and 143,907.80 is: 215,975.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,439.80 : 552,951.30 = 143,907.80 : x
  2. Step 2: Convert to fraction form
    368,439.80/552,951.30 = 143,907.80/x
  3. Step 3: Cross multiply
    368,439.80x = 552,951.30 × 143,907.80
  4. Step 4: Simplify right side
    368,439.80x = 79,574,005,090.14
  5. Step 5: Solve for x
    x = 79,574,005,090.14/368,439.80
  6. Step 6: Final answer
    x = 215,975.60

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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.