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Finding the Fourth Proportional to 617,871.20, 926,806.80 and 369,039.20

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Solution

The fourth proportional to 617,871.20, 926,806.80 and 369,039.20 is: 553,558.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,871.20 : 926,806.80 = 369,039.20 : x
  2. Step 2: Convert to fraction form
    617,871.20/926,806.80 = 369,039.20/x
  3. Step 3: Cross multiply
    617,871.20x = 926,806.80 × 369,039.20
  4. Step 4: Simplify right side
    617,871.20x = 342,028,040,026.56
  5. Step 5: Solve for x
    x = 342,028,040,026.56/617,871.20
  6. Step 6: Final answer
    x = 553,558.80

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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.