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Finding the Fourth Proportional to 567.79, 783.59 and 319.12

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Solution

The fourth proportional to 567.79, 783.59 and 319.12 is: 440.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    567.79 : 783.59 = 319.12 : x
  2. Step 2: Convert to fraction form
    567.79/783.59 = 319.12/x
  3. Step 3: Cross multiply
    567.79x = 783.59 × 319.12
  4. Step 4: Simplify right side
    567.79x = 250,055.69
  5. Step 5: Solve for x
    x = 250,055.69/567.79
  6. Step 6: Final answer
    x = 440.40

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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.