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Finding the Fourth Proportional to 644,043.88, 888,783.78 and 402,466.84

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Solution

The fourth proportional to 644,043.88, 888,783.78 and 402,466.84 is: 555,406.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,043.88 : 888,783.78 = 402,466.84 : x
  2. Step 2: Convert to fraction form
    644,043.88/888,783.78 = 402,466.84/x
  3. Step 3: Cross multiply
    644,043.88x = 888,783.78 × 402,466.84
  4. Step 4: Simplify right side
    644,043.88x = 357,705,999,379.86
  5. Step 5: Solve for x
    x = 357,705,999,379.86/644,043.88
  6. Step 6: Final answer
    x = 555,406.25

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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.