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Finding the Fourth Proportional to 686,638, 1,030,240.50 and 370,722.88

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Solution

The fourth proportional to 686,638, 1,030,240.50 and 370,722.88 is: 556,237.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,638 : 1,030,240.50 = 370,722.88 : x
  2. Step 2: Convert to fraction form
    686,638/1,030,240.50 = 370,722.88/x
  3. Step 3: Cross multiply
    686,638x = 1,030,240.50 × 370,722.88
  4. Step 4: Simplify right side
    686,638x = 381,933,725,252.64
  5. Step 5: Solve for x
    x = 381,933,725,252.64/686,638
  6. Step 6: Final answer
    x = 556,237.38

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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.