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Finding the Fourth Proportional to 641,811.12, 963,662.88 and 358,056

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Solution

The fourth proportional to 641,811.12, 963,662.88 and 358,056 is: 537,611.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,811.12 : 963,662.88 = 358,056 : x
  2. Step 2: Convert to fraction form
    641,811.12/963,662.88 = 358,056/x
  3. Step 3: Cross multiply
    641,811.12x = 963,662.88 × 358,056
  4. Step 4: Simplify right side
    641,811.12x = 345,045,276,161.28
  5. Step 5: Solve for x
    x = 345,045,276,161.28/641,811.12
  6. Step 6: Final answer
    x = 537,611.87

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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.