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Finding the Fourth Proportional to 219,390.72, 328,947.84 and 186,122.40

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Solution

The fourth proportional to 219,390.72, 328,947.84 and 186,122.40 is: 279,066.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,390.72 : 328,947.84 = 186,122.40 : x
  2. Step 2: Convert to fraction form
    219,390.72/328,947.84 = 186,122.40/x
  3. Step 3: Cross multiply
    219,390.72x = 328,947.84 × 186,122.40
  4. Step 4: Simplify right side
    219,390.72x = 61,224,561,455.62
  5. Step 5: Solve for x
    x = 61,224,561,455.62/219,390.72
  6. Step 6: Final answer
    x = 279,066.32

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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.