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Finding the Fourth Proportional to 328,548.66, 492,876.29 and 128,760.74

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Solution

The fourth proportional to 328,548.66, 492,876.29 and 128,760.74 is: 193,162.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,548.66 : 492,876.29 = 128,760.74 : x
  2. Step 2: Convert to fraction form
    328,548.66/492,876.29 = 128,760.74/x
  3. Step 3: Cross multiply
    328,548.66x = 492,876.29 × 128,760.74
  4. Step 4: Simplify right side
    328,548.66x = 63,463,115,534.66
  5. Step 5: Solve for x
    x = 63,463,115,534.66/328,548.66
  6. Step 6: Final answer
    x = 193,162.00

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.