Home / 1,138,435.90-1,707,653.85-428,623.18

Finding the Fourth Proportional to 1,138,435.90, 1,707,653.85 and 428,623.18

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Solution

The fourth proportional to 1,138,435.90, 1,707,653.85 and 428,623.18 is: 642,934.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,138,435.90 : 1,707,653.85 = 428,623.18 : x
  2. Step 2: Convert to fraction form
    1,138,435.90/1,707,653.85 = 428,623.18/x
  3. Step 3: Cross multiply
    1,138,435.90x = 1,707,653.85 × 428,623.18
  4. Step 4: Simplify right side
    1,138,435.90x = 731,940,023,526.24
  5. Step 5: Solve for x
    x = 731,940,023,526.24/1,138,435.90
  6. Step 6: Final answer
    x = 642,934.77

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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.