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Finding the Fourth Proportional to 567.64, 783.35 and 318.99

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Solution

The fourth proportional to 567.64, 783.35 and 318.99 is: 440.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    567.64 : 783.35 = 318.99 : x
  2. Step 2: Convert to fraction form
    567.64/783.35 = 318.99/x
  3. Step 3: Cross multiply
    567.64x = 783.35 × 318.99
  4. Step 4: Simplify right side
    567.64x = 249,880.82
  5. Step 5: Solve for x
    x = 249,880.82/567.64
  6. Step 6: Final answer
    x = 440.21

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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.