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Finding the Fourth Proportional to 485,406.59, 727,538.00 and 218,855.03

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Solution

The fourth proportional to 485,406.59, 727,538.00 and 218,855.03 is: 328,024.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,406.59 : 727,538.00 = 218,855.03 : x
  2. Step 2: Convert to fraction form
    485,406.59/727,538.00 = 218,855.03/x
  3. Step 3: Cross multiply
    485,406.59x = 727,538.00 × 218,855.03
  4. Step 4: Simplify right side
    485,406.59x = 159,225,346,084.18
  5. Step 5: Solve for x
    x = 159,225,346,084.18/485,406.59
  6. Step 6: Final answer
    x = 328,024.69

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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.