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Finding the Fourth Proportional to 644,798.73, 889,546.17 and 402,660.98

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Solution

The fourth proportional to 644,798.73, 889,546.17 and 402,660.98 is: 555,499.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,798.73 : 889,546.17 = 402,660.98 : x
  2. Step 2: Convert to fraction form
    644,798.73/889,546.17 = 402,660.98/x
  3. Step 3: Cross multiply
    644,798.73x = 889,546.17 × 402,660.98
  4. Step 4: Simplify right side
    644,798.73x = 358,185,526,106.41
  5. Step 5: Solve for x
    x = 358,185,526,106.41/644,798.73
  6. Step 6: Final answer
    x = 555,499.74

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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.