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Finding the Fourth Proportional to 545,779.62, 818,817.14 and 309,288.38

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Solution

The fourth proportional to 545,779.62, 818,817.14 and 309,288.38 is: 464,016.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,779.62 : 818,817.14 = 309,288.38 : x
  2. Step 2: Convert to fraction form
    545,779.62/818,817.14 = 309,288.38/x
  3. Step 3: Cross multiply
    545,779.62x = 818,817.14 × 309,288.38
  4. Step 4: Simplify right side
    545,779.62x = 253,250,626,746.83
  5. Step 5: Solve for x
    x = 253,250,626,746.83/545,779.62
  6. Step 6: Final answer
    x = 464,016.28

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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.