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Finding the Fourth Proportional to 545,879.20, 818,041.20 and 402,606.40

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Solution

The fourth proportional to 545,879.20, 818,041.20 and 402,606.40 is: 603,336.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,879.20 : 818,041.20 = 402,606.40 : x
  2. Step 2: Convert to fraction form
    545,879.20/818,041.20 = 402,606.40/x
  3. Step 3: Cross multiply
    545,879.20x = 818,041.20 × 402,606.40
  4. Step 4: Simplify right side
    545,879.20x = 329,348,622,583.68
  5. Step 5: Solve for x
    x = 329,348,622,583.68/545,879.20
  6. Step 6: Final answer
    x = 603,336.09

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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.