Home / 428,988.96-590,868.32-319,743.20

Finding the Fourth Proportional to 428,988.96, 590,868.32 and 319,743.20

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Solution

The fourth proportional to 428,988.96, 590,868.32 and 319,743.20 is: 440,398.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,988.96 : 590,868.32 = 319,743.20 : x
  2. Step 2: Convert to fraction form
    428,988.96/590,868.32 = 319,743.20/x
  3. Step 3: Cross multiply
    428,988.96x = 590,868.32 × 319,743.20
  4. Step 4: Simplify right side
    428,988.96x = 188,926,127,415.42
  5. Step 5: Solve for x
    x = 188,926,127,415.42/428,988.96
  6. Step 6: Final answer
    x = 440,398.58

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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.