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Finding the Fourth Proportional to 383,280.88, 528,990.60 and 213,569.68

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Solution

The fourth proportional to 383,280.88, 528,990.60 and 213,569.68 is: 294,761.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,280.88 : 528,990.60 = 213,569.68 : x
  2. Step 2: Convert to fraction form
    383,280.88/528,990.60 = 213,569.68/x
  3. Step 3: Cross multiply
    383,280.88x = 528,990.60 × 213,569.68
  4. Step 4: Simplify right side
    383,280.88x = 112,976,353,165.01
  5. Step 5: Solve for x
    x = 112,976,353,165.01/383,280.88
  6. Step 6: Final answer
    x = 294,761.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.