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Finding the Fourth Proportional to 328,663.72, 492,240.06 and 208,711.72

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Solution

The fourth proportional to 328,663.72, 492,240.06 and 208,711.72 is: 312,587.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,663.72 : 492,240.06 = 208,711.72 : x
  2. Step 2: Convert to fraction form
    328,663.72/492,240.06 = 208,711.72/x
  3. Step 3: Cross multiply
    328,663.72x = 492,240.06 × 208,711.72
  4. Step 4: Simplify right side
    328,663.72x = 102,736,269,575.50
  5. Step 5: Solve for x
    x = 102,736,269,575.50/328,663.72
  6. Step 6: Final answer
    x = 312,587.80

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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.