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Finding the Fourth Proportional to 398,878.48, 550,655.44 and 308,030.48

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Solution

The fourth proportional to 398,878.48, 550,655.44 and 308,030.48 is: 425,238.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,878.48 : 550,655.44 = 308,030.48 : x
  2. Step 2: Convert to fraction form
    398,878.48/550,655.44 = 308,030.48/x
  3. Step 3: Cross multiply
    398,878.48x = 550,655.44 × 308,030.48
  4. Step 4: Simplify right side
    398,878.48x = 169,618,659,497.81
  5. Step 5: Solve for x
    x = 169,618,659,497.81/398,878.48
  6. Step 6: Final answer
    x = 425,238.93

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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.