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Finding the Fourth Proportional to 609,121.76, 913,663.62 and 289,503.72

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Solution

The fourth proportional to 609,121.76, 913,663.62 and 289,503.72 is: 434,246.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    609,121.76 : 913,663.62 = 289,503.72 : x
  2. Step 2: Convert to fraction form
    609,121.76/913,663.62 = 289,503.72/x
  3. Step 3: Cross multiply
    609,121.76x = 913,663.62 × 289,503.72
  4. Step 4: Simplify right side
    609,121.76x = 264,509,016,818.67
  5. Step 5: Solve for x
    x = 264,509,016,818.67/609,121.76
  6. Step 6: Final answer
    x = 434,246.54

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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.