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Finding the Fourth Proportional to 605,640.30, 907,476.30 and 521,003.40

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Solution

The fourth proportional to 605,640.30, 907,476.30 and 521,003.40 is: 780,658.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,640.30 : 907,476.30 = 521,003.40 : x
  2. Step 2: Convert to fraction form
    605,640.30/907,476.30 = 521,003.40/x
  3. Step 3: Cross multiply
    605,640.30x = 907,476.30 × 521,003.40
  4. Step 4: Simplify right side
    605,640.30x = 472,798,237,719.42
  5. Step 5: Solve for x
    x = 472,798,237,719.42/605,640.30
  6. Step 6: Final answer
    x = 780,658.48

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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.