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Finding the Fourth Proportional to 621,919.74, 858,265.80 and 349,997.34

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Solution

The fourth proportional to 621,919.74, 858,265.80 and 349,997.34 is: 483,005.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,919.74 : 858,265.80 = 349,997.34 : x
  2. Step 2: Convert to fraction form
    621,919.74/858,265.80 = 349,997.34/x
  3. Step 3: Cross multiply
    621,919.74x = 858,265.80 × 349,997.34
  4. Step 4: Simplify right side
    621,919.74x = 300,390,747,012.97
  5. Step 5: Solve for x
    x = 300,390,747,012.97/621,919.74
  6. Step 6: Final answer
    x = 483,005.65

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Double scale
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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.