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Finding the Fourth Proportional to 509,425.76, 763,938.48 and 172,373.60

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Solution

The fourth proportional to 509,425.76, 763,938.48 and 172,373.60 is: 258,492.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,425.76 : 763,938.48 = 172,373.60 : x
  2. Step 2: Convert to fraction form
    509,425.76/763,938.48 = 172,373.60/x
  3. Step 3: Cross multiply
    509,425.76x = 763,938.48 × 172,373.60
  4. Step 4: Simplify right side
    509,425.76x = 131,682,825,976.13
  5. Step 5: Solve for x
    x = 131,682,825,976.13/509,425.76
  6. Step 6: Final answer
    x = 258,492.67

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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.