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Finding the Fourth Proportional to 621,754.90, 857,960.50 and 349,816.79

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Solution

The fourth proportional to 621,754.90, 857,960.50 and 349,816.79 is: 482,712.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,754.90 : 857,960.50 = 349,816.79 : x
  2. Step 2: Convert to fraction form
    621,754.90/857,960.50 = 349,816.79/x
  3. Step 3: Cross multiply
    621,754.90x = 857,960.50 × 349,816.79
  4. Step 4: Simplify right side
    621,754.90x = 300,128,982,892.45
  5. Step 5: Solve for x
    x = 300,128,982,892.45/621,754.90
  6. Step 6: Final answer
    x = 482,712.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.