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Finding the Fourth Proportional to 328,040.37, 491,986.71 and 117,678.30

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Solution

The fourth proportional to 328,040.37, 491,986.71 and 117,678.30 is: 176,490.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,040.37 : 491,986.71 = 117,678.30 : x
  2. Step 2: Convert to fraction form
    328,040.37/491,986.71 = 117,678.30/x
  3. Step 3: Cross multiply
    328,040.37x = 491,986.71 × 117,678.30
  4. Step 4: Simplify right side
    328,040.37x = 57,896,159,655.39
  5. Step 5: Solve for x
    x = 57,896,159,655.39/328,040.37
  6. Step 6: Final answer
    x = 176,490.96

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1.5x scale

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.