Home / 621,899.98-858,238.55-349,977.58

Finding the Fourth Proportional to 621,899.98, 858,238.55 and 349,977.58

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Solution

The fourth proportional to 621,899.98, 858,238.55 and 349,977.58 is: 482,978.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,899.98 : 858,238.55 = 349,977.58 : x
  2. Step 2: Convert to fraction form
    621,899.98/858,238.55 = 349,977.58/x
  3. Step 3: Cross multiply
    621,899.98x = 858,238.55 × 349,977.58
  4. Step 4: Simplify right side
    621,899.98x = 300,364,250,791.71
  5. Step 5: Solve for x
    x = 300,364,250,791.71/621,899.98
  6. Step 6: Final answer
    x = 482,978.39

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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.