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Finding the Fourth Proportional to 620,394.78, 929,930.40 and 353,580.78

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Solution

The fourth proportional to 620,394.78, 929,930.40 and 353,580.78 is: 529,994.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,394.78 : 929,930.40 = 353,580.78 : x
  2. Step 2: Convert to fraction form
    620,394.78/929,930.40 = 353,580.78/x
  3. Step 3: Cross multiply
    620,394.78x = 929,930.40 × 353,580.78
  4. Step 4: Simplify right side
    620,394.78x = 328,805,516,177.71
  5. Step 5: Solve for x
    x = 328,805,516,177.71/620,394.78
  6. Step 6: Final answer
    x = 529,994.01

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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.