Home / 1,690,565-2,535,995.10-428,392.68

Finding the Fourth Proportional to 1,690,565, 2,535,995.10 and 428,392.68

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Solution

The fourth proportional to 1,690,565, 2,535,995.10 and 428,392.68 is: 642,626.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,690,565 : 2,535,995.10 = 428,392.68 : x
  2. Step 2: Convert to fraction form
    1,690,565/2,535,995.10 = 428,392.68/x
  3. Step 3: Cross multiply
    1,690,565x = 2,535,995.10 × 428,392.68
  4. Step 4: Simplify right side
    1,690,565x = 1,086,401,737,355.87
  5. Step 5: Solve for x
    x = 1,086,401,737,355.87/1,690,565
  6. Step 6: Final answer
    x = 642,626.42

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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.