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Finding the Fourth Proportional to 605,749.30, 907,639.80 and 521,112.40

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Solution

The fourth proportional to 605,749.30, 907,639.80 and 521,112.40 is: 780,821.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,749.30 : 907,639.80 = 521,112.40 : x
  2. Step 2: Convert to fraction form
    605,749.30/907,639.80 = 521,112.40/x
  3. Step 3: Cross multiply
    605,749.30x = 907,639.80 × 521,112.40
  4. Step 4: Simplify right side
    605,749.30x = 472,982,354,513.52
  5. Step 5: Solve for x
    x = 472,982,354,513.52/605,749.30
  6. Step 6: Final answer
    x = 780,821.96

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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.