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Finding the Fourth Proportional to 567.86, 783.61 and 319.22

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Solution

The fourth proportional to 567.86, 783.61 and 319.22 is: 440.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    567.86 : 783.61 = 319.22 : x
  2. Step 2: Convert to fraction form
    567.86/783.61 = 319.22/x
  3. Step 3: Cross multiply
    567.86x = 783.61 × 319.22
  4. Step 4: Simplify right side
    567.86x = 250,146.36
  5. Step 5: Solve for x
    x = 250,146.36/567.86
  6. Step 6: Final answer
    x = 440.50

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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.