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Finding the Fourth Proportional to 310,570.56, 428,487.84 and 191,407.68

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Solution

The fourth proportional to 310,570.56, 428,487.84 and 191,407.68 is: 264,081.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,570.56 : 428,487.84 = 191,407.68 : x
  2. Step 2: Convert to fraction form
    310,570.56/428,487.84 = 191,407.68/x
  3. Step 3: Cross multiply
    310,570.56x = 428,487.84 × 191,407.68
  4. Step 4: Simplify right side
    310,570.56x = 82,015,863,362.61
  5. Step 5: Solve for x
    x = 82,015,863,362.61/310,570.56
  6. Step 6: Final answer
    x = 264,081.26

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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.