Home / 419,979.40-629,969.10-370,990.60

Finding the Fourth Proportional to 419,979.40, 629,969.10 and 370,990.60

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Solution

The fourth proportional to 419,979.40, 629,969.10 and 370,990.60 is: 556,485.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,979.40 : 629,969.10 = 370,990.60 : x
  2. Step 2: Convert to fraction form
    419,979.40/629,969.10 = 370,990.60/x
  3. Step 3: Cross multiply
    419,979.40x = 629,969.10 × 370,990.60
  4. Step 4: Simplify right side
    419,979.40x = 233,712,614,390.46
  5. Step 5: Solve for x
    x = 233,712,614,390.46/419,979.40
  6. Step 6: Final answer
    x = 556,485.90

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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.