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Finding the Fourth Proportional to 538,274.54, 742,926.44 and 308,986.83

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Solution

The fourth proportional to 538,274.54, 742,926.44 and 308,986.83 is: 426,463.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,274.54 : 742,926.44 = 308,986.83 : x
  2. Step 2: Convert to fraction form
    538,274.54/742,926.44 = 308,986.83/x
  3. Step 3: Cross multiply
    538,274.54x = 742,926.44 × 308,986.83
  4. Step 4: Simplify right side
    538,274.54x = 229,554,486,391.25
  5. Step 5: Solve for x
    x = 229,554,486,391.25/538,274.54
  6. Step 6: Final answer
    x = 426,463.58

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Half scale
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Double scale
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Similar ratio
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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.