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Finding the Fourth Proportional to 328,986.72, 493,475.76 and 104,346.72

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Solution

The fourth proportional to 328,986.72, 493,475.76 and 104,346.72 is: 156,518.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,986.72 : 493,475.76 = 104,346.72 : x
  2. Step 2: Convert to fraction form
    328,986.72/493,475.76 = 104,346.72/x
  3. Step 3: Cross multiply
    328,986.72x = 493,475.76 × 104,346.72
  4. Step 4: Simplify right side
    328,986.72x = 51,492,576,955.51
  5. Step 5: Solve for x
    x = 51,492,576,955.51/328,986.72
  6. Step 6: Final answer
    x = 156,518.71

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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.