Home / 1,290.53-1,935.77-424.85

Finding the Fourth Proportional to 1,290.53, 1,935.77 and 424.85

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Solution

The fourth proportional to 1,290.53, 1,935.77 and 424.85 is: 637.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290.53 : 1,935.77 = 424.85 : x
  2. Step 2: Convert to fraction form
    1,290.53/1,935.77 = 424.85/x
  3. Step 3: Cross multiply
    1,290.53x = 1,935.77 × 424.85
  4. Step 4: Simplify right side
    1,290.53x = 822,400.08
  5. Step 5: Solve for x
    x = 822,400.08/1,290.53
  6. Step 6: Final answer
    x = 637.26

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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.