Home / 990,134.10-1,365,945.45-645,890.73

Finding the Fourth Proportional to 990,134.10, 1,365,945.45 and 645,890.73

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Solution

The fourth proportional to 990,134.10, 1,365,945.45 and 645,890.73 is: 891,042.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,134.10 : 1,365,945.45 = 645,890.73 : x
  2. Step 2: Convert to fraction form
    990,134.10/1,365,945.45 = 645,890.73/x
  3. Step 3: Cross multiply
    990,134.10x = 1,365,945.45 × 645,890.73
  4. Step 4: Simplify right side
    990,134.10x = 882,251,503,840.68
  5. Step 5: Solve for x
    x = 882,251,503,840.68/990,134.10
  6. Step 6: Final answer
    x = 891,042.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.