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Finding the Fourth Proportional to 965.51, 1,448.23 and 316.25

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Solution

The fourth proportional to 965.51, 1,448.23 and 316.25 is: 474.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    965.51 : 1,448.23 = 316.25 : x
  2. Step 2: Convert to fraction form
    965.51/1,448.23 = 316.25/x
  3. Step 3: Cross multiply
    965.51x = 1,448.23 × 316.25
  4. Step 4: Simplify right side
    965.51x = 458,002.74
  5. Step 5: Solve for x
    x = 458,002.74/965.51
  6. Step 6: Final answer
    x = 474.36

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Double scale
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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.