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Finding the Fourth Proportional to 545,355.34, 818,406.70 and 190,369.42

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Solution

The fourth proportional to 545,355.34, 818,406.70 and 190,369.42 is: 285,684.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,355.34 : 818,406.70 = 190,369.42 : x
  2. Step 2: Convert to fraction form
    545,355.34/818,406.70 = 190,369.42/x
  3. Step 3: Cross multiply
    545,355.34x = 818,406.70 × 190,369.42
  4. Step 4: Simplify right side
    545,355.34x = 155,799,608,803.11
  5. Step 5: Solve for x
    x = 155,799,608,803.11/545,355.34
  6. Step 6: Final answer
    x = 285,684.58

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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.