Home / 1,159.12-1,739.36-429.21

Finding the Fourth Proportional to 1,159.12, 1,739.36 and 429.21

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Solution

The fourth proportional to 1,159.12, 1,739.36 and 429.21 is: 644.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,159.12 : 1,739.36 = 429.21 : x
  2. Step 2: Convert to fraction form
    1,159.12/1,739.36 = 429.21/x
  3. Step 3: Cross multiply
    1,159.12x = 1,739.36 × 429.21
  4. Step 4: Simplify right side
    1,159.12x = 746,550.71
  5. Step 5: Solve for x
    x = 746,550.71/1,159.12
  6. Step 6: Final answer
    x = 644.07

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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.