Home / 1,690,329.69-2,535,586.88-428,168.25

Finding the Fourth Proportional to 1,690,329.69, 2,535,586.88 and 428,168.25

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Solution

The fourth proportional to 1,690,329.69, 2,535,586.88 and 428,168.25 is: 642,275.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,690,329.69 : 2,535,586.88 = 428,168.25 : x
  2. Step 2: Convert to fraction form
    1,690,329.69/2,535,586.88 = 428,168.25/x
  3. Step 3: Cross multiply
    1,690,329.69x = 2,535,586.88 × 428,168.25
  4. Step 4: Simplify right side
    1,690,329.69x = 1,085,657,794,991.72
  5. Step 5: Solve for x
    x = 1,085,657,794,991.72/1,690,329.69
  6. Step 6: Final answer
    x = 642,275.77

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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.