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Finding the Fourth Proportional to 644,366.66, 889,201.27 and 357,905.03

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Solution

The fourth proportional to 644,366.66, 889,201.27 and 357,905.03 is: 493,895.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,366.66 : 889,201.27 = 357,905.03 : x
  2. Step 2: Convert to fraction form
    644,366.66/889,201.27 = 357,905.03/x
  3. Step 3: Cross multiply
    644,366.66x = 889,201.27 × 357,905.03
  4. Step 4: Simplify right side
    644,366.66x = 318,249,607,215.39
  5. Step 5: Solve for x
    x = 318,249,607,215.39/644,366.66
  6. Step 6: Final answer
    x = 493,895.21

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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.