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Finding the Fourth Proportional to 567.53, 783.21 and 318.85

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Solution

The fourth proportional to 567.53, 783.21 and 318.85 is: 440.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    567.53 : 783.21 = 318.85 : x
  2. Step 2: Convert to fraction form
    567.53/783.21 = 318.85/x
  3. Step 3: Cross multiply
    567.53x = 783.21 × 318.85
  4. Step 4: Simplify right side
    567.53x = 249,725.75
  5. Step 5: Solve for x
    x = 249,725.75/567.53
  6. Step 6: Final answer
    x = 440.02

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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.