Home / 686,945.10-1,030,417.65-640,289.10

Finding the Fourth Proportional to 686,945.10, 1,030,417.65 and 640,289.10

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Solution

The fourth proportional to 686,945.10, 1,030,417.65 and 640,289.10 is: 960,433.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,945.10 : 1,030,417.65 = 640,289.10 : x
  2. Step 2: Convert to fraction form
    686,945.10/1,030,417.65 = 640,289.10/x
  3. Step 3: Cross multiply
    686,945.10x = 1,030,417.65 × 640,289.10
  4. Step 4: Simplify right side
    686,945.10x = 659,765,189,742.62
  5. Step 5: Solve for x
    x = 659,765,189,742.62/686,945.10
  6. Step 6: Final answer
    x = 960,433.65

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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.