Home / 685,133.20-1,027,699.80-657,139.60

Finding the Fourth Proportional to 685,133.20, 1,027,699.80 and 657,139.60

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Solution

The fourth proportional to 685,133.20, 1,027,699.80 and 657,139.60 is: 985,709.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,133.20 : 1,027,699.80 = 657,139.60 : x
  2. Step 2: Convert to fraction form
    685,133.20/1,027,699.80 = 657,139.60/x
  3. Step 3: Cross multiply
    685,133.20x = 1,027,699.80 × 657,139.60
  4. Step 4: Simplify right side
    685,133.20x = 675,342,235,492.08
  5. Step 5: Solve for x
    x = 675,342,235,492.08/685,133.20
  6. Step 6: Final answer
    x = 985,709.40

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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.