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Finding the Fourth Proportional to 538,328.36, 742,909.96 and 308,927.60

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Solution

The fourth proportional to 538,328.36, 742,909.96 and 308,927.60 is: 426,329.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,328.36 : 742,909.96 = 308,927.60 : x
  2. Step 2: Convert to fraction form
    538,328.36/742,909.96 = 308,927.60/x
  3. Step 3: Cross multiply
    538,328.36x = 742,909.96 × 308,927.60
  4. Step 4: Simplify right side
    538,328.36x = 229,505,392,857.57
  5. Step 5: Solve for x
    x = 229,505,392,857.57/538,328.36
  6. Step 6: Final answer
    x = 426,329.75

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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.