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Finding the Fourth Proportional to 644,806.60, 966,918.30 and 289,637.80

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Solution

The fourth proportional to 644,806.60, 966,918.30 and 289,637.80 is: 434,325.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,806.60 : 966,918.30 = 289,637.80 : x
  2. Step 2: Convert to fraction form
    644,806.60/966,918.30 = 289,637.80/x
  3. Step 3: Cross multiply
    644,806.60x = 966,918.30 × 289,637.80
  4. Step 4: Simplify right side
    644,806.60x = 280,056,089,191.74
  5. Step 5: Solve for x
    x = 280,056,089,191.74/644,806.60
  6. Step 6: Final answer
    x = 434,325.72

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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.