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Finding the Fourth Proportional to 567.55, 783.23 and 318.93

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Solution

The fourth proportional to 567.55, 783.23 and 318.93 is: 440.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    567.55 : 783.23 = 318.93 : x
  2. Step 2: Convert to fraction form
    567.55/783.23 = 318.93/x
  3. Step 3: Cross multiply
    567.55x = 783.23 × 318.93
  4. Step 4: Simplify right side
    567.55x = 249,795.54
  5. Step 5: Solve for x
    x = 249,795.54/567.55
  6. Step 6: Final answer
    x = 440.13

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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.