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Finding the Fourth Proportional to 618,973.02, 928,459.53 and 408,561.75

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Solution

The fourth proportional to 618,973.02, 928,459.53 and 408,561.75 is: 612,842.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,973.02 : 928,459.53 = 408,561.75 : x
  2. Step 2: Convert to fraction form
    618,973.02/928,459.53 = 408,561.75/x
  3. Step 3: Cross multiply
    618,973.02x = 928,459.53 × 408,561.75
  4. Step 4: Simplify right side
    618,973.02x = 379,333,050,380.98
  5. Step 5: Solve for x
    x = 379,333,050,380.98/618,973.02
  6. Step 6: Final answer
    x = 612,842.63

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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.