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Finding the Fourth Proportional to 629,096.76, 942,980.40 and 428,920.92

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Solution

The fourth proportional to 629,096.76, 942,980.40 and 428,920.92 is: 642,928.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    629,096.76 : 942,980.40 = 428,920.92 : x
  2. Step 2: Convert to fraction form
    629,096.76/942,980.40 = 428,920.92/x
  3. Step 3: Cross multiply
    629,096.76x = 942,980.40 × 428,920.92
  4. Step 4: Simplify right side
    629,096.76x = 404,464,020,709.97
  5. Step 5: Solve for x
    x = 404,464,020,709.97/629,096.76
  6. Step 6: Final answer
    x = 642,928.16

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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.