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Finding the Fourth Proportional to 567.80, 783.47 and 319.05

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Solution

The fourth proportional to 567.80, 783.47 and 319.05 is: 440.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    567.80 : 783.47 = 319.05 : x
  2. Step 2: Convert to fraction form
    567.80/783.47 = 319.05/x
  3. Step 3: Cross multiply
    567.80x = 783.47 × 319.05
  4. Step 4: Simplify right side
    567.80x = 249,964.51
  5. Step 5: Solve for x
    x = 249,964.51/567.80
  6. Step 6: Final answer
    x = 440.24

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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.