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Finding the Fourth Proportional to 644,285.66, 889,559.01 and 402,676.83

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Solution

The fourth proportional to 644,285.66, 889,559.01 and 402,676.83 is: 555,972.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,285.66 : 889,559.01 = 402,676.83 : x
  2. Step 2: Convert to fraction form
    644,285.66/889,559.01 = 402,676.83/x
  3. Step 3: Cross multiply
    644,285.66x = 889,559.01 × 402,676.83
  4. Step 4: Simplify right side
    644,285.66x = 358,204,802,244.74
  5. Step 5: Solve for x
    x = 358,204,802,244.74/644,285.66
  6. Step 6: Final answer
    x = 555,972.03

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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.