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Finding the Fourth Proportional to 628,374.80, 942,562.20 and 328,739.60

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Solution

The fourth proportional to 628,374.80, 942,562.20 and 328,739.60 is: 493,109.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,374.80 : 942,562.20 = 328,739.60 : x
  2. Step 2: Convert to fraction form
    628,374.80/942,562.20 = 328,739.60/x
  3. Step 3: Cross multiply
    628,374.80x = 942,562.20 × 328,739.60
  4. Step 4: Simplify right side
    628,374.80x = 309,857,520,603.12
  5. Step 5: Solve for x
    x = 309,857,520,603.12/628,374.80
  6. Step 6: Final answer
    x = 493,109.40

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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.