Home / 687,276.30-1,031,011.65-213,912.30

Finding the Fourth Proportional to 687,276.30, 1,031,011.65 and 213,912.30

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Solution

The fourth proportional to 687,276.30, 1,031,011.65 and 213,912.30 is: 320,898.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,276.30 : 1,031,011.65 = 213,912.30 : x
  2. Step 2: Convert to fraction form
    687,276.30/1,031,011.65 = 213,912.30/x
  3. Step 3: Cross multiply
    687,276.30x = 1,031,011.65 × 213,912.30
  4. Step 4: Simplify right side
    687,276.30x = 220,546,073,378.30
  5. Step 5: Solve for x
    x = 220,546,073,378.30/687,276.30
  6. Step 6: Final answer
    x = 320,898.70

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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.