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Finding the Fourth Proportional to 558,860.51, 769,519.64 and 421,239.44

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Solution

The fourth proportional to 558,860.51, 769,519.64 and 421,239.44 is: 580,023.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    558,860.51 : 769,519.64 = 421,239.44 : x
  2. Step 2: Convert to fraction form
    558,860.51/769,519.64 = 421,239.44/x
  3. Step 3: Cross multiply
    558,860.51x = 769,519.64 × 421,239.44
  4. Step 4: Simplify right side
    558,860.51x = 324,152,020,870.95
  5. Step 5: Solve for x
    x = 324,152,020,870.95/558,860.51
  6. Step 6: Final answer
    x = 580,023.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.