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Finding the Fourth Proportional to 611,690.20, 858,137.75 and 611,690.20

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Solution

The fourth proportional to 611,690.20, 858,137.75 and 611,690.20 is: 858,137.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,690.20 : 858,137.75 = 611,690.20 : x
  2. Step 2: Convert to fraction form
    611,690.20/858,137.75 = 611,690.20/x
  3. Step 3: Cross multiply
    611,690.20x = 858,137.75 × 611,690.20
  4. Step 4: Simplify right side
    611,690.20x = 524,914,451,925.05
  5. Step 5: Solve for x
    x = 524,914,451,925.05/611,690.20
  6. Step 6: Final answer
    x = 858,137.75

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.