Home / 687,838.80-1,031,855.40-214,474.80

Finding the Fourth Proportional to 687,838.80, 1,031,855.40 and 214,474.80

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Solution

The fourth proportional to 687,838.80, 1,031,855.40 and 214,474.80 is: 321,742.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,838.80 : 1,031,855.40 = 214,474.80 : x
  2. Step 2: Convert to fraction form
    687,838.80/1,031,855.40 = 214,474.80/x
  3. Step 3: Cross multiply
    687,838.80x = 1,031,855.40 × 214,474.80
  4. Step 4: Simplify right side
    687,838.80x = 221,306,980,543.92
  5. Step 5: Solve for x
    x = 221,306,980,543.92/687,838.80
  6. Step 6: Final answer
    x = 321,742.51

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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.