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Finding the Fourth Proportional to 648.90, 973.46 and 216.16

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Solution

The fourth proportional to 648.90, 973.46 and 216.16 is: 324.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.90 : 973.46 = 216.16 : x
  2. Step 2: Convert to fraction form
    648.90/973.46 = 216.16/x
  3. Step 3: Cross multiply
    648.90x = 973.46 × 216.16
  4. Step 4: Simplify right side
    648.90x = 210,423.11
  5. Step 5: Solve for x
    x = 210,423.11/648.90
  6. Step 6: Final answer
    x = 324.28

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1.5x scale

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.