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Finding the Fourth Proportional to 653.51, 980.27 and 411.72

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Solution

The fourth proportional to 653.51, 980.27 and 411.72 is: 617.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.51 : 980.27 = 411.72 : x
  2. Step 2: Convert to fraction form
    653.51/980.27 = 411.72/x
  3. Step 3: Cross multiply
    653.51x = 980.27 × 411.72
  4. Step 4: Simplify right side
    653.51x = 403,594.71
  5. Step 5: Solve for x
    x = 403,594.71/653.51
  6. Step 6: Final answer
    x = 617.58

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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.