Home / 780.03-1,076.49-430.79

Finding the Fourth Proportional to 780.03, 1,076.49 and 430.79

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Solution

The fourth proportional to 780.03, 1,076.49 and 430.79 is: 594.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    780.03 : 1,076.49 = 430.79 : x
  2. Step 2: Convert to fraction form
    780.03/1,076.49 = 430.79/x
  3. Step 3: Cross multiply
    780.03x = 1,076.49 × 430.79
  4. Step 4: Simplify right side
    780.03x = 463,735.74
  5. Step 5: Solve for x
    x = 463,735.74/780.03
  6. Step 6: Final answer
    x = 594.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.