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Finding the Fourth Proportional to 653.90, 978.52 and 568.25

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Solution

The fourth proportional to 653.90, 978.52 and 568.25 is: 850.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.90 : 978.52 = 568.25 : x
  2. Step 2: Convert to fraction form
    653.90/978.52 = 568.25/x
  3. Step 3: Cross multiply
    653.90x = 978.52 × 568.25
  4. Step 4: Simplify right side
    653.90x = 556,043.99
  5. Step 5: Solve for x
    x = 556,043.99/653.90
  6. Step 6: Final answer
    x = 850.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.