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Finding the Fourth Proportional to 383,325.48, 528,990 and 213,565.68

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Solution

The fourth proportional to 383,325.48, 528,990 and 213,565.68 is: 294,721.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,325.48 : 528,990 = 213,565.68 : x
  2. Step 2: Convert to fraction form
    383,325.48/528,990 = 213,565.68/x
  3. Step 3: Cross multiply
    383,325.48x = 528,990 × 213,565.68
  4. Step 4: Simplify right side
    383,325.48x = 112,974,109,063.20
  5. Step 5: Solve for x
    x = 112,974,109,063.20/383,325.48
  6. Step 6: Final answer
    x = 294,721.11

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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.