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Finding the Fourth Proportional to 648,732.80, 973,099.20 and 611,991.20

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Solution

The fourth proportional to 648,732.80, 973,099.20 and 611,991.20 is: 917,986.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,732.80 : 973,099.20 = 611,991.20 : x
  2. Step 2: Convert to fraction form
    648,732.80/973,099.20 = 611,991.20/x
  3. Step 3: Cross multiply
    648,732.80x = 973,099.20 × 611,991.20
  4. Step 4: Simplify right side
    648,732.80x = 595,528,147,127.04
  5. Step 5: Solve for x
    x = 595,528,147,127.04/648,732.80
  6. Step 6: Final answer
    x = 917,986.80

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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.