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Finding the Fourth Proportional to 661,991.60, 991,966.80 and 492,717.80

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Solution

The fourth proportional to 661,991.60, 991,966.80 and 492,717.80 is: 738,317.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,991.60 : 991,966.80 = 492,717.80 : x
  2. Step 2: Convert to fraction form
    661,991.60/991,966.80 = 492,717.80/x
  3. Step 3: Cross multiply
    661,991.60x = 991,966.80 × 492,717.80
  4. Step 4: Simplify right side
    661,991.60x = 488,759,699,369.04
  5. Step 5: Solve for x
    x = 488,759,699,369.04/661,991.60
  6. Step 6: Final answer
    x = 738,317.07

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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.