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Finding the Fourth Proportional to 621,624.69, 857,840.84 and 349,692.80

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Solution

The fourth proportional to 621,624.69, 857,840.84 and 349,692.80 is: 482,575.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,624.69 : 857,840.84 = 349,692.80 : x
  2. Step 2: Convert to fraction form
    621,624.69/857,840.84 = 349,692.80/x
  3. Step 3: Cross multiply
    621,624.69x = 857,840.84 × 349,692.80
  4. Step 4: Simplify right side
    621,624.69x = 299,980,765,293.95
  5. Step 5: Solve for x
    x = 299,980,765,293.95/621,624.69
  6. Step 6: Final answer
    x = 482,575.37

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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.