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Finding the Fourth Proportional to 641,956.80, 962,935.20 and 455,332.80

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Solution

The fourth proportional to 641,956.80, 962,935.20 and 455,332.80 is: 682,999.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,956.80 : 962,935.20 = 455,332.80 : x
  2. Step 2: Convert to fraction form
    641,956.80/962,935.20 = 455,332.80/x
  3. Step 3: Cross multiply
    641,956.80x = 962,935.20 × 455,332.80
  4. Step 4: Simplify right side
    641,956.80x = 438,455,980,834.56
  5. Step 5: Solve for x
    x = 438,455,980,834.56/641,956.80
  6. Step 6: Final answer
    x = 682,999.20

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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.