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Finding the Fourth Proportional to 545,135.42, 817,645.62 and 145,816.49

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Solution

The fourth proportional to 545,135.42, 817,645.62 and 145,816.49 is: 218,709.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,135.42 : 817,645.62 = 145,816.49 : x
  2. Step 2: Convert to fraction form
    545,135.42/817,645.62 = 145,816.49/x
  3. Step 3: Cross multiply
    545,135.42x = 817,645.62 × 145,816.49
  4. Step 4: Simplify right side
    545,135.42x = 119,226,214,372.27
  5. Step 5: Solve for x
    x = 119,226,214,372.27/545,135.42
  6. Step 6: Final answer
    x = 218,709.35

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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.