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Finding the Fourth Proportional to 525,428.84, 724,811.60 and 321,578.56

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Solution

The fourth proportional to 525,428.84, 724,811.60 and 321,578.56 is: 443,606.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,428.84 : 724,811.60 = 321,578.56 : x
  2. Step 2: Convert to fraction form
    525,428.84/724,811.60 = 321,578.56/x
  3. Step 3: Cross multiply
    525,428.84x = 724,811.60 × 321,578.56
  4. Step 4: Simplify right side
    525,428.84x = 233,083,870,599.30
  5. Step 5: Solve for x
    x = 233,083,870,599.30/525,428.84
  6. Step 6: Final answer
    x = 443,606.92

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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.