Home / 687,747.60-1,031,621.40-214,429.20

Finding the Fourth Proportional to 687,747.60, 1,031,621.40 and 214,429.20

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Solution

The fourth proportional to 687,747.60, 1,031,621.40 and 214,429.20 is: 321,643.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,747.60 : 1,031,621.40 = 214,429.20 : x
  2. Step 2: Convert to fraction form
    687,747.60/1,031,621.40 = 214,429.20/x
  3. Step 3: Cross multiply
    687,747.60x = 1,031,621.40 × 214,429.20
  4. Step 4: Simplify right side
    687,747.60x = 221,209,751,504.88
  5. Step 5: Solve for x
    x = 221,209,751,504.88/687,747.60
  6. Step 6: Final answer
    x = 321,643.80

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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.