Home / 686,807.90-1,030,519.05-312,638.30

Finding the Fourth Proportional to 686,807.90, 1,030,519.05 and 312,638.30

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Solution

The fourth proportional to 686,807.90, 1,030,519.05 and 312,638.30 is: 469,097.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,807.90 : 1,030,519.05 = 312,638.30 : x
  2. Step 2: Convert to fraction form
    686,807.90/1,030,519.05 = 312,638.30/x
  3. Step 3: Cross multiply
    686,807.90x = 1,030,519.05 × 312,638.30
  4. Step 4: Simplify right side
    686,807.90x = 322,179,723,909.62
  5. Step 5: Solve for x
    x = 322,179,723,909.62/686,807.90
  6. Step 6: Final answer
    x = 469,097.29

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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.