Home / 687,742.30-1,031,620.20-207,973.90

Finding the Fourth Proportional to 687,742.30, 1,031,620.20 and 207,973.90

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Solution

The fourth proportional to 687,742.30, 1,031,620.20 and 207,973.90 is: 311,962.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,742.30 : 1,031,620.20 = 207,973.90 : x
  2. Step 2: Convert to fraction form
    687,742.30/1,031,620.20 = 207,973.90/x
  3. Step 3: Cross multiply
    687,742.30x = 1,031,620.20 × 207,973.90
  4. Step 4: Simplify right side
    687,742.30x = 214,550,076,312.78
  5. Step 5: Solve for x
    x = 214,550,076,312.78/687,742.30
  6. Step 6: Final answer
    x = 311,962.89

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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.