Home / 686,721.40-1,030,238.70-213,454.60

Finding the Fourth Proportional to 686,721.40, 1,030,238.70 and 213,454.60

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Solution

The fourth proportional to 686,721.40, 1,030,238.70 and 213,454.60 is: 320,230.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,721.40 : 1,030,238.70 = 213,454.60 : x
  2. Step 2: Convert to fraction form
    686,721.40/1,030,238.70 = 213,454.60/x
  3. Step 3: Cross multiply
    686,721.40x = 1,030,238.70 × 213,454.60
  4. Step 4: Simplify right side
    686,721.40x = 219,909,189,613.02
  5. Step 5: Solve for x
    x = 219,909,189,613.02/686,721.40
  6. Step 6: Final answer
    x = 320,230.58

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1.5x scale

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.