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Finding the Fourth Proportional to 538,274.23, 742,926.02 and 308,986.54

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Solution

The fourth proportional to 538,274.23, 742,926.02 and 308,986.54 is: 426,463.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,274.23 : 742,926.02 = 308,986.54 : x
  2. Step 2: Convert to fraction form
    538,274.23/742,926.02 = 308,986.54/x
  3. Step 3: Cross multiply
    538,274.23x = 742,926.02 × 308,986.54
  4. Step 4: Simplify right side
    538,274.23x = 229,554,140,395.77
  5. Step 5: Solve for x
    x = 229,554,140,395.77/538,274.23
  6. Step 6: Final answer
    x = 426,463.18

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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.