Home / 687,243.84-1,030,865.76-213,977.04

Finding the Fourth Proportional to 687,243.84, 1,030,865.76 and 213,977.04

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Solution

The fourth proportional to 687,243.84, 1,030,865.76 and 213,977.04 is: 320,965.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,243.84 : 1,030,865.76 = 213,977.04 : x
  2. Step 2: Convert to fraction form
    687,243.84/1,030,865.76 = 213,977.04/x
  3. Step 3: Cross multiply
    687,243.84x = 1,030,865.76 × 213,977.04
  4. Step 4: Simplify right side
    687,243.84x = 220,581,603,962.15
  5. Step 5: Solve for x
    x = 220,581,603,962.15/687,243.84
  6. Step 6: Final answer
    x = 320,965.56

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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.