Home / 990,143.30-1,488,386.10-919,940.60

Finding the Fourth Proportional to 990,143.30, 1,488,386.10 and 919,940.60

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Solution

The fourth proportional to 990,143.30, 1,488,386.10 and 919,940.60 is: 1,382,857.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,143.30 : 1,488,386.10 = 919,940.60 : x
  2. Step 2: Convert to fraction form
    990,143.30/1,488,386.10 = 919,940.60/x
  3. Step 3: Cross multiply
    990,143.30x = 1,488,386.10 × 919,940.60
  4. Step 4: Simplify right side
    990,143.30x = 1,369,226,801,865.66
  5. Step 5: Solve for x
    x = 1,369,226,801,865.66/990,143.30
  6. Step 6: Final answer
    x = 1,382,857.21

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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.