Home / 1,159.79-1,739.32-429.19

Finding the Fourth Proportional to 1,159.79, 1,739.32 and 429.19

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Solution

The fourth proportional to 1,159.79, 1,739.32 and 429.19 is: 643.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,159.79 : 1,739.32 = 429.19 : x
  2. Step 2: Convert to fraction form
    1,159.79/1,739.32 = 429.19/x
  3. Step 3: Cross multiply
    1,159.79x = 1,739.32 × 429.19
  4. Step 4: Simplify right side
    1,159.79x = 746,493.33
  5. Step 5: Solve for x
    x = 746,493.33/1,159.79
  6. Step 6: Final answer
    x = 643.65

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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.