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Finding the Fourth Proportional to 611,579.20, 917,368.80 and 517,100.80

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Solution

The fourth proportional to 611,579.20, 917,368.80 and 517,100.80 is: 775,651.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,579.20 : 917,368.80 = 517,100.80 : x
  2. Step 2: Convert to fraction form
    611,579.20/917,368.80 = 517,100.80/x
  3. Step 3: Cross multiply
    611,579.20x = 917,368.80 × 517,100.80
  4. Step 4: Simplify right side
    611,579.20x = 474,372,140,375.04
  5. Step 5: Solve for x
    x = 474,372,140,375.04/611,579.20
  6. Step 6: Final answer
    x = 775,651.20

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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.