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Finding the Fourth Proportional to 545,136.45, 817,707.74 and 485,441.59

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Solution

The fourth proportional to 545,136.45, 817,707.74 and 485,441.59 is: 728,165.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,136.45 : 817,707.74 = 485,441.59 : x
  2. Step 2: Convert to fraction form
    545,136.45/817,707.74 = 485,441.59/x
  3. Step 3: Cross multiply
    545,136.45x = 817,707.74 × 485,441.59
  4. Step 4: Simplify right side
    545,136.45x = 396,949,345,253.24
  5. Step 5: Solve for x
    x = 396,949,345,253.24/545,136.45
  6. Step 6: Final answer
    x = 728,165.12

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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.