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Finding the Fourth Proportional to 993,940.80, 1,489,744.80 and 425,320.80

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Solution

The fourth proportional to 993,940.80, 1,489,744.80 and 425,320.80 is: 637,482.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    993,940.80 : 1,489,744.80 = 425,320.80 : x
  2. Step 2: Convert to fraction form
    993,940.80/1,489,744.80 = 425,320.80/x
  3. Step 3: Cross multiply
    993,940.80x = 1,489,744.80 × 425,320.80
  4. Step 4: Simplify right side
    993,940.80x = 633,619,450,131.84
  5. Step 5: Solve for x
    x = 633,619,450,131.84/993,940.80
  6. Step 6: Final answer
    x = 637,482.08

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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.