Home / 687,839.80-1,031,856.90-214,475.80

Finding the Fourth Proportional to 687,839.80, 1,031,856.90 and 214,475.80

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Solution

The fourth proportional to 687,839.80, 1,031,856.90 and 214,475.80 is: 321,744.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,839.80 : 1,031,856.90 = 214,475.80 : x
  2. Step 2: Convert to fraction form
    687,839.80/1,031,856.90 = 214,475.80/x
  3. Step 3: Cross multiply
    687,839.80x = 1,031,856.90 × 214,475.80
  4. Step 4: Simplify right side
    687,839.80x = 221,308,334,113.02
  5. Step 5: Solve for x
    x = 221,308,334,113.02/687,839.80
  6. Step 6: Final answer
    x = 321,744.01

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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.