Home / 687,753.60-1,031,630.40-214,435.20

Finding the Fourth Proportional to 687,753.60, 1,031,630.40 and 214,435.20

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Solution

The fourth proportional to 687,753.60, 1,031,630.40 and 214,435.20 is: 321,652.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,753.60 : 1,031,630.40 = 214,435.20 : x
  2. Step 2: Convert to fraction form
    687,753.60/1,031,630.40 = 214,435.20/x
  3. Step 3: Cross multiply
    687,753.60x = 1,031,630.40 × 214,435.20
  4. Step 4: Simplify right side
    687,753.60x = 221,217,871,150.08
  5. Step 5: Solve for x
    x = 221,217,871,150.08/687,753.60
  6. Step 6: Final answer
    x = 321,652.80

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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.