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Finding the Fourth Proportional to 369,991.60, 554,744.40 and 145,216.60

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Solution

The fourth proportional to 369,991.60, 554,744.40 and 145,216.60 is: 217,729.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    369,991.60 : 554,744.40 = 145,216.60 : x
  2. Step 2: Convert to fraction form
    369,991.60/554,744.40 = 145,216.60/x
  3. Step 3: Cross multiply
    369,991.60x = 554,744.40 × 145,216.60
  4. Step 4: Simplify right side
    369,991.60x = 80,558,095,637.04
  5. Step 5: Solve for x
    x = 80,558,095,637.04/369,991.60
  6. Step 6: Final answer
    x = 217,729.53

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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.