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Finding the Fourth Proportional to 809,748.60, 1,213,586.10 and 621,828.60

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Solution

The fourth proportional to 809,748.60, 1,213,586.10 and 621,828.60 is: 931,946.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,748.60 : 1,213,586.10 = 621,828.60 : x
  2. Step 2: Convert to fraction form
    809,748.60/1,213,586.10 = 621,828.60/x
  3. Step 3: Cross multiply
    809,748.60x = 1,213,586.10 × 621,828.60
  4. Step 4: Simplify right side
    809,748.60x = 754,642,545,542.46
  5. Step 5: Solve for x
    x = 754,642,545,542.46/809,748.60
  6. Step 6: Final answer
    x = 931,946.71

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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.