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Finding the Fourth Proportional to 491,995.51, 678,955.04 and 285,303.96

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Solution

The fourth proportional to 491,995.51, 678,955.04 and 285,303.96 is: 393,720.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,995.51 : 678,955.04 = 285,303.96 : x
  2. Step 2: Convert to fraction form
    491,995.51/678,955.04 = 285,303.96/x
  3. Step 3: Cross multiply
    491,995.51x = 678,955.04 × 285,303.96
  4. Step 4: Simplify right side
    491,995.51x = 193,708,561,573.96
  5. Step 5: Solve for x
    x = 193,708,561,573.96/491,995.51
  6. Step 6: Final answer
    x = 393,720.18

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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.