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Finding the Fourth Proportional to 638,611.40, 956,880.30 and 401,529.80

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Solution

The fourth proportional to 638,611.40, 956,880.30 and 401,529.80 is: 601,642.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,611.40 : 956,880.30 = 401,529.80 : x
  2. Step 2: Convert to fraction form
    638,611.40/956,880.30 = 401,529.80/x
  3. Step 3: Cross multiply
    638,611.40x = 956,880.30 × 401,529.80
  4. Step 4: Simplify right side
    638,611.40x = 384,215,955,482.94
  5. Step 5: Solve for x
    x = 384,215,955,482.94/638,611.40
  6. Step 6: Final answer
    x = 601,642.81

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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.