Home / 310,119.15-428,010.70-189,330.47

Finding the Fourth Proportional to 310,119.15, 428,010.70 and 189,330.47

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Solution

The fourth proportional to 310,119.15, 428,010.70 and 189,330.47 is: 261,304.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,119.15 : 428,010.70 = 189,330.47 : x
  2. Step 2: Convert to fraction form
    310,119.15/428,010.70 = 189,330.47/x
  3. Step 3: Cross multiply
    310,119.15x = 428,010.70 × 189,330.47
  4. Step 4: Simplify right side
    310,119.15x = 81,035,464,855.98
  5. Step 5: Solve for x
    x = 81,035,464,855.98/310,119.15
  6. Step 6: Final answer
    x = 261,304.29

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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.