Home / 990,142.30-1,488,384.60-919,939.60

Finding the Fourth Proportional to 990,142.30, 1,488,384.60 and 919,939.60

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Solution

The fourth proportional to 990,142.30, 1,488,384.60 and 919,939.60 is: 1,382,855.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,142.30 : 1,488,384.60 = 919,939.60 : x
  2. Step 2: Convert to fraction form
    990,142.30/1,488,384.60 = 919,939.60/x
  3. Step 3: Cross multiply
    990,142.30x = 1,488,384.60 × 919,939.60
  4. Step 4: Simplify right side
    990,142.30x = 1,369,223,933,570.16
  5. Step 5: Solve for x
    x = 1,369,223,933,570.16/990,142.30
  6. Step 6: Final answer
    x = 1,382,855.71

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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.