Home / 985,998.30-1,478,133.45-669,428.70

Finding the Fourth Proportional to 985,998.30, 1,478,133.45 and 669,428.70

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Solution

The fourth proportional to 985,998.30, 1,478,133.45 and 669,428.70 is: 1,003,556.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    985,998.30 : 1,478,133.45 = 669,428.70 : x
  2. Step 2: Convert to fraction form
    985,998.30/1,478,133.45 = 669,428.70/x
  3. Step 3: Cross multiply
    985,998.30x = 1,478,133.45 × 669,428.70
  4. Step 4: Simplify right side
    985,998.30x = 989,504,953,860.02
  5. Step 5: Solve for x
    x = 989,504,953,860.02/985,998.30
  6. Step 6: Final answer
    x = 1,003,556.45

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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.