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Finding the Fourth Proportional to 567.34, 783.03 and 390.16

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Solution

The fourth proportional to 567.34, 783.03 and 390.16 is: 538.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    567.34 : 783.03 = 390.16 : x
  2. Step 2: Convert to fraction form
    567.34/783.03 = 390.16/x
  3. Step 3: Cross multiply
    567.34x = 783.03 × 390.16
  4. Step 4: Simplify right side
    567.34x = 305,501.73
  5. Step 5: Solve for x
    x = 305,501.73/567.34
  6. Step 6: Final answer
    x = 538.48

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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.