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Finding the Fourth Proportional to 948.37, 1,308.27 and 653.80

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Solution

The fourth proportional to 948.37, 1,308.27 and 653.80 is: 901.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    948.37 : 1,308.27 = 653.80 : x
  2. Step 2: Convert to fraction form
    948.37/1,308.27 = 653.80/x
  3. Step 3: Cross multiply
    948.37x = 1,308.27 × 653.80
  4. Step 4: Simplify right side
    948.37x = 855,346.93
  5. Step 5: Solve for x
    x = 855,346.93/948.37
  6. Step 6: Final answer
    x = 901.91

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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.