Home / 1,190.34-1,784.80-459.31

Finding the Fourth Proportional to 1,190.34, 1,784.80 and 459.31

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Solution

The fourth proportional to 1,190.34, 1,784.80 and 459.31 is: 688.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,190.34 : 1,784.80 = 459.31 : x
  2. Step 2: Convert to fraction form
    1,190.34/1,784.80 = 459.31/x
  3. Step 3: Cross multiply
    1,190.34x = 1,784.80 × 459.31
  4. Step 4: Simplify right side
    1,190.34x = 819,776.49
  5. Step 5: Solve for x
    x = 819,776.49/1,190.34
  6. Step 6: Final answer
    x = 688.69

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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.