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Finding the Fourth Proportional to 519,622.80, 779,543.55 and 164,672.70

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Solution

The fourth proportional to 519,622.80, 779,543.55 and 164,672.70 is: 247,043.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,622.80 : 779,543.55 = 164,672.70 : x
  2. Step 2: Convert to fraction form
    519,622.80/779,543.55 = 164,672.70/x
  3. Step 3: Cross multiply
    519,622.80x = 779,543.55 × 164,672.70
  4. Step 4: Simplify right side
    519,622.80x = 128,369,541,146.09
  5. Step 5: Solve for x
    x = 128,369,541,146.09/519,622.80
  6. Step 6: Final answer
    x = 247,043.70

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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.