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Finding the Fourth Proportional to 538,313.81, 742,855.46 and 308,867.40

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Solution

The fourth proportional to 538,313.81, 742,855.46 and 308,867.40 is: 426,226.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,313.81 : 742,855.46 = 308,867.40 : x
  2. Step 2: Convert to fraction form
    538,313.81/742,855.46 = 308,867.40/x
  3. Step 3: Cross multiply
    538,313.81x = 742,855.46 × 308,867.40
  4. Step 4: Simplify right side
    538,313.81x = 229,443,832,961.67
  5. Step 5: Solve for x
    x = 229,443,832,961.67/538,313.81
  6. Step 6: Final answer
    x = 426,226.92

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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.