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Finding the Fourth Proportional to 783.07, 1,080.43 and 468.19

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Solution

The fourth proportional to 783.07, 1,080.43 and 468.19 is: 645.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    783.07 : 1,080.43 = 468.19 : x
  2. Step 2: Convert to fraction form
    783.07/1,080.43 = 468.19/x
  3. Step 3: Cross multiply
    783.07x = 1,080.43 × 468.19
  4. Step 4: Simplify right side
    783.07x = 505,846.70
  5. Step 5: Solve for x
    x = 505,846.70/783.07
  6. Step 6: Final answer
    x = 645.98

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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.