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Finding the Fourth Proportional to 428,555.25, 591,412.91 and 234,980.60

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Solution

The fourth proportional to 428,555.25, 591,412.91 and 234,980.60 is: 324,276.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,555.25 : 591,412.91 = 234,980.60 : x
  2. Step 2: Convert to fraction form
    428,555.25/591,412.91 = 234,980.60/x
  3. Step 3: Cross multiply
    428,555.25x = 591,412.91 × 234,980.60
  4. Step 4: Simplify right side
    428,555.25x = 138,970,556,307.58
  5. Step 5: Solve for x
    x = 138,970,556,307.58/428,555.25
  6. Step 6: Final answer
    x = 324,276.87

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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.