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Finding the Fourth Proportional to 368,868.20, 553,302.30 and 191,721.20

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Solution

The fourth proportional to 368,868.20, 553,302.30 and 191,721.20 is: 287,581.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,868.20 : 553,302.30 = 191,721.20 : x
  2. Step 2: Convert to fraction form
    368,868.20/553,302.30 = 191,721.20/x
  3. Step 3: Cross multiply
    368,868.20x = 553,302.30 × 191,721.20
  4. Step 4: Simplify right side
    368,868.20x = 106,079,780,918.76
  5. Step 5: Solve for x
    x = 106,079,780,918.76/368,868.20
  6. Step 6: Final answer
    x = 287,581.80

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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.