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Finding the Fourth Proportional to 368,530.80, 553,087.80 and 143,998.80

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Solution

The fourth proportional to 368,530.80, 553,087.80 and 143,998.80 is: 216,112.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,530.80 : 553,087.80 = 143,998.80 : x
  2. Step 2: Convert to fraction form
    368,530.80/553,087.80 = 143,998.80/x
  3. Step 3: Cross multiply
    368,530.80x = 553,087.80 × 143,998.80
  4. Step 4: Simplify right side
    368,530.80x = 79,643,979,494.64
  5. Step 5: Solve for x
    x = 79,643,979,494.64/368,530.80
  6. Step 6: Final answer
    x = 216,112.14

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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.