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Finding the Fourth Proportional to 644,820.72, 889,833.87 and 369,169.35

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Solution

The fourth proportional to 644,820.72, 889,833.87 and 369,169.35 is: 509,442.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,820.72 : 889,833.87 = 369,169.35 : x
  2. Step 2: Convert to fraction form
    644,820.72/889,833.87 = 369,169.35/x
  3. Step 3: Cross multiply
    644,820.72x = 889,833.87 × 369,169.35
  4. Step 4: Simplify right side
    644,820.72x = 328,499,391,395.88
  5. Step 5: Solve for x
    x = 328,499,391,395.88/644,820.72
  6. Step 6: Final answer
    x = 509,442.98

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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.