Home / 686,874.30-1,030,408.65-213,510.30

Finding the Fourth Proportional to 686,874.30, 1,030,408.65 and 213,510.30

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Solution

The fourth proportional to 686,874.30, 1,030,408.65 and 213,510.30 is: 320,295.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,874.30 : 1,030,408.65 = 213,510.30 : x
  2. Step 2: Convert to fraction form
    686,874.30/1,030,408.65 = 213,510.30/x
  3. Step 3: Cross multiply
    686,874.30x = 1,030,408.65 × 213,510.30
  4. Step 4: Simplify right side
    686,874.30x = 220,002,859,984.10
  5. Step 5: Solve for x
    x = 220,002,859,984.10/686,874.30
  6. Step 6: Final answer
    x = 320,295.66

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Double scale
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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.