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Finding the Fourth Proportional to 407,074.68, 561,690.45 and 245,821.77

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Solution

The fourth proportional to 407,074.68, 561,690.45 and 245,821.77 is: 339,190.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,074.68 : 561,690.45 = 245,821.77 : x
  2. Step 2: Convert to fraction form
    407,074.68/561,690.45 = 245,821.77/x
  3. Step 3: Cross multiply
    407,074.68x = 561,690.45 × 245,821.77
  4. Step 4: Simplify right side
    407,074.68x = 138,075,740,611.10
  5. Step 5: Solve for x
    x = 138,075,740,611.10/407,074.68
  6. Step 6: Final answer
    x = 339,190.20

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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.