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Finding the Fourth Proportional to 567.79, 783.51 and 319.09

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Solution

The fourth proportional to 567.79, 783.51 and 319.09 is: 440.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    567.79 : 783.51 = 319.09 : x
  2. Step 2: Convert to fraction form
    567.79/783.51 = 319.09/x
  3. Step 3: Cross multiply
    567.79x = 783.51 × 319.09
  4. Step 4: Simplify right side
    567.79x = 250,010.21
  5. Step 5: Solve for x
    x = 250,010.21/567.79
  6. Step 6: Final answer
    x = 440.32

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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.