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Finding the Fourth Proportional to 545,140.94, 817,714.49 and 485,446.10

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Solution

The fourth proportional to 545,140.94, 817,714.49 and 485,446.10 is: 728,171.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,140.94 : 817,714.49 = 485,446.10 : x
  2. Step 2: Convert to fraction form
    545,140.94/817,714.49 = 485,446.10/x
  3. Step 3: Cross multiply
    545,140.94x = 817,714.49 × 485,446.10
  4. Step 4: Simplify right side
    545,140.94x = 396,956,303,568.19
  5. Step 5: Solve for x
    x = 396,956,303,568.19/545,140.94
  6. Step 6: Final answer
    x = 728,171.89

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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.