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Finding the Fourth Proportional to 644,364.66, 889,198.52 and 357,903.03

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Solution

The fourth proportional to 644,364.66, 889,198.52 and 357,903.03 is: 493,892.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,364.66 : 889,198.52 = 357,903.03 : x
  2. Step 2: Convert to fraction form
    644,364.66/889,198.52 = 357,903.03/x
  3. Step 3: Cross multiply
    644,364.66x = 889,198.52 × 357,903.03
  4. Step 4: Simplify right side
    644,364.66x = 318,246,842,790.00
  5. Step 5: Solve for x
    x = 318,246,842,790.00/644,364.66
  6. Step 6: Final answer
    x = 493,892.45

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.