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Finding the Fourth Proportional to 619,129.71, 928,503 and 299,082.78

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Solution

The fourth proportional to 619,129.71, 928,503 and 299,082.78 is: 448,531.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,129.71 : 928,503 = 299,082.78 : x
  2. Step 2: Convert to fraction form
    619,129.71/928,503 = 299,082.78/x
  3. Step 3: Cross multiply
    619,129.71x = 928,503 × 299,082.78
  4. Step 4: Simplify right side
    619,129.71x = 277,699,258,478.34
  5. Step 5: Solve for x
    x = 277,699,258,478.34/619,129.71
  6. Step 6: Final answer
    x = 448,531.63

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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.