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Finding the Fourth Proportional to 567.33, 783.23 and 390.54

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Solution

The fourth proportional to 567.33, 783.23 and 390.54 is: 539.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    567.33 : 783.23 = 390.54 : x
  2. Step 2: Convert to fraction form
    567.33/783.23 = 390.54/x
  3. Step 3: Cross multiply
    567.33x = 783.23 × 390.54
  4. Step 4: Simplify right side
    567.33x = 305,882.64
  5. Step 5: Solve for x
    x = 305,882.64/567.33
  6. Step 6: Final answer
    x = 539.16

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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.