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Finding the Fourth Proportional to 310,350.36, 428,148.54 and 195,559.32

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Solution

The fourth proportional to 310,350.36, 428,148.54 and 195,559.32 is: 269,786.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,350.36 : 428,148.54 = 195,559.32 : x
  2. Step 2: Convert to fraction form
    310,350.36/428,148.54 = 195,559.32/x
  3. Step 3: Cross multiply
    310,350.36x = 428,148.54 × 195,559.32
  4. Step 4: Simplify right side
    310,350.36x = 83,728,437,341.39
  5. Step 5: Solve for x
    x = 83,728,437,341.39/310,350.36
  6. Step 6: Final answer
    x = 269,786.82

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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.