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Finding the Fourth Proportional to 368,352.72, 553,569.12 and 218,620.98

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Solution

The fourth proportional to 368,352.72, 553,569.12 and 218,620.98 is: 328,548.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,352.72 : 553,569.12 = 218,620.98 : x
  2. Step 2: Convert to fraction form
    368,352.72/553,569.12 = 218,620.98/x
  3. Step 3: Cross multiply
    368,352.72x = 553,569.12 × 218,620.98
  4. Step 4: Simplify right side
    368,352.72x = 121,021,823,512.14
  5. Step 5: Solve for x
    x = 121,021,823,512.14/368,352.72
  6. Step 6: Final answer
    x = 328,548.74

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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.