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Finding the Fourth Proportional to 621,132.30, 857,142.72 and 349,211.70

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Solution

The fourth proportional to 621,132.30, 857,142.72 and 349,211.70 is: 481,900.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,132.30 : 857,142.72 = 349,211.70 : x
  2. Step 2: Convert to fraction form
    621,132.30/857,142.72 = 349,211.70/x
  3. Step 3: Cross multiply
    621,132.30x = 857,142.72 × 349,211.70
  4. Step 4: Simplify right side
    621,132.30x = 299,324,266,393.82
  5. Step 5: Solve for x
    x = 299,324,266,393.82/621,132.30
  6. Step 6: Final answer
    x = 481,900.98

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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.