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Finding the Fourth Proportional to 618,657.68, 928,065 and 219,220.40

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Solution

The fourth proportional to 618,657.68, 928,065 and 219,220.40 is: 328,858.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,657.68 : 928,065 = 219,220.40 : x
  2. Step 2: Convert to fraction form
    618,657.68/928,065 = 219,220.40/x
  3. Step 3: Cross multiply
    618,657.68x = 928,065 × 219,220.40
  4. Step 4: Simplify right side
    618,657.68x = 203,450,780,526
  5. Step 5: Solve for x
    x = 203,450,780,526/618,657.68
  6. Step 6: Final answer
    x = 328,858.41

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.