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Finding the Fourth Proportional to 563,638.32, 777,804.80 and 321,915.89

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Solution

The fourth proportional to 563,638.32, 777,804.80 and 321,915.89 is: 444,234.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    563,638.32 : 777,804.80 = 321,915.89 : x
  2. Step 2: Convert to fraction form
    563,638.32/777,804.80 = 321,915.89/x
  3. Step 3: Cross multiply
    563,638.32x = 777,804.80 × 321,915.89
  4. Step 4: Simplify right side
    563,638.32x = 250,387,724,773.21
  5. Step 5: Solve for x
    x = 250,387,724,773.21/563,638.32
  6. Step 6: Final answer
    x = 444,234.74

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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.