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Finding the Fourth Proportional to 388,930.60, 583,323.90 and 108,389.80

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Solution

The fourth proportional to 388,930.60, 583,323.90 and 108,389.80 is: 162,564.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,930.60 : 583,323.90 = 108,389.80 : x
  2. Step 2: Convert to fraction form
    388,930.60/583,323.90 = 108,389.80/x
  3. Step 3: Cross multiply
    388,930.60x = 583,323.90 × 108,389.80
  4. Step 4: Simplify right side
    388,930.60x = 63,226,360,856.22
  5. Step 5: Solve for x
    x = 63,226,360,856.22/388,930.60
  6. Step 6: Final answer
    x = 162,564.63

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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.