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Finding the Fourth Proportional to 619,317.40, 929,840.10 and 396,059.80

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Solution

The fourth proportional to 619,317.40, 929,840.10 and 396,059.80 is: 594,642.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,317.40 : 929,840.10 = 396,059.80 : x
  2. Step 2: Convert to fraction form
    619,317.40/929,840.10 = 396,059.80/x
  3. Step 3: Cross multiply
    619,317.40x = 929,840.10 × 396,059.80
  4. Step 4: Simplify right side
    619,317.40x = 368,272,284,037.98
  5. Step 5: Solve for x
    x = 368,272,284,037.98/619,317.40
  6. Step 6: Final answer
    x = 594,642.24

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.