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Finding the Fourth Proportional to 383,319.60, 528,981.60 and 213,559.68

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Solution

The fourth proportional to 383,319.60, 528,981.60 and 213,559.68 is: 294,712.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,319.60 : 528,981.60 = 213,559.68 : x
  2. Step 2: Convert to fraction form
    383,319.60/528,981.60 = 213,559.68/x
  3. Step 3: Cross multiply
    383,319.60x = 528,981.60 × 213,559.68
  4. Step 4: Simplify right side
    383,319.60x = 112,969,141,221.89
  5. Step 5: Solve for x
    x = 112,969,141,221.89/383,319.60
  6. Step 6: Final answer
    x = 294,712.67

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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.