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Finding the Fourth Proportional to 629,890.81, 869,258.72 and 343,415.68

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Solution

The fourth proportional to 629,890.81, 869,258.72 and 343,415.68 is: 473,918.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    629,890.81 : 869,258.72 = 343,415.68 : x
  2. Step 2: Convert to fraction form
    629,890.81/869,258.72 = 343,415.68/x
  3. Step 3: Cross multiply
    629,890.81x = 869,258.72 × 343,415.68
  4. Step 4: Simplify right side
    629,890.81x = 298,517,074,424.73
  5. Step 5: Solve for x
    x = 298,517,074,424.73/629,890.81
  6. Step 6: Final answer
    x = 473,918.76

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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.