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Finding the Fourth Proportional to 641,928.30, 962,892.45 and 455,304.30

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Solution

The fourth proportional to 641,928.30, 962,892.45 and 455,304.30 is: 682,956.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,928.30 : 962,892.45 = 455,304.30 : x
  2. Step 2: Convert to fraction form
    641,928.30/962,892.45 = 455,304.30/x
  3. Step 3: Cross multiply
    641,928.30x = 962,892.45 × 455,304.30
  4. Step 4: Simplify right side
    641,928.30x = 438,409,072,922.54
  5. Step 5: Solve for x
    x = 438,409,072,922.54/641,928.30
  6. Step 6: Final answer
    x = 682,956.45

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Half scale
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Double scale
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Similar ratio
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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.