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Finding the Fourth Proportional to 930.51, 1,284.10 and 552.42

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Solution

The fourth proportional to 930.51, 1,284.10 and 552.42 is: 762.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    930.51 : 1,284.10 = 552.42 : x
  2. Step 2: Convert to fraction form
    930.51/1,284.10 = 552.42/x
  3. Step 3: Cross multiply
    930.51x = 1,284.10 × 552.42
  4. Step 4: Simplify right side
    930.51x = 709,361.14
  5. Step 5: Solve for x
    x = 709,361.14/930.51
  6. Step 6: Final answer
    x = 762.34

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Double scale
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1.5x scale

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.