Home / 1,690,563-2,535,992.10-428,390.67

Finding the Fourth Proportional to 1,690,563, 2,535,992.10 and 428,390.67

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Solution

The fourth proportional to 1,690,563, 2,535,992.10 and 428,390.67 is: 642,623.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,690,563 : 2,535,992.10 = 428,390.67 : x
  2. Step 2: Convert to fraction form
    1,690,563/2,535,992.10 = 428,390.67/x
  3. Step 3: Cross multiply
    1,690,563x = 2,535,992.10 × 428,390.67
  4. Step 4: Simplify right side
    1,690,563x = 1,086,395,354,833.71
  5. Step 5: Solve for x
    x = 1,086,395,354,833.71/1,690,563
  6. Step 6: Final answer
    x = 642,623.41

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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.