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Finding the Fourth Proportional to 644,498.58, 889,383.32 and 358,036.68

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Solution

The fourth proportional to 644,498.58, 889,383.32 and 358,036.68 is: 494,076.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,498.58 : 889,383.32 = 358,036.68 : x
  2. Step 2: Convert to fraction form
    644,498.58/889,383.32 = 358,036.68/x
  3. Step 3: Cross multiply
    644,498.58x = 889,383.32 × 358,036.68
  4. Step 4: Simplify right side
    644,498.58x = 318,431,851,140.18
  5. Step 5: Solve for x
    x = 318,431,851,140.18/644,498.58
  6. Step 6: Final answer
    x = 494,076.89

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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.