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Finding the Fourth Proportional to 664,075.80, 994,925.70 and 403,939.80

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Solution

The fourth proportional to 664,075.80, 994,925.70 and 403,939.80 is: 605,187.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,075.80 : 994,925.70 = 403,939.80 : x
  2. Step 2: Convert to fraction form
    664,075.80/994,925.70 = 403,939.80/x
  3. Step 3: Cross multiply
    664,075.80x = 994,925.70 × 403,939.80
  4. Step 4: Simplify right side
    664,075.80x = 401,890,088,272.86
  5. Step 5: Solve for x
    x = 401,890,088,272.86/664,075.80
  6. Step 6: Final answer
    x = 605,187.07

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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.