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Finding the Fourth Proportional to 545,328.70, 818,004.39 and 145,969

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Solution

The fourth proportional to 545,328.70, 818,004.39 and 145,969 is: 218,956.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,328.70 : 818,004.39 = 145,969 : x
  2. Step 2: Convert to fraction form
    545,328.70/818,004.39 = 145,969/x
  3. Step 3: Cross multiply
    545,328.70x = 818,004.39 × 145,969
  4. Step 4: Simplify right side
    545,328.70x = 119,403,282,803.91
  5. Step 5: Solve for x
    x = 119,403,282,803.91/545,328.70
  6. Step 6: Final answer
    x = 218,956.54

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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.