Home / 687,808.20-1,031,712.30-475,231.80

Finding the Fourth Proportional to 687,808.20, 1,031,712.30 and 475,231.80

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Solution

The fourth proportional to 687,808.20, 1,031,712.30 and 475,231.80 is: 712,847.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,808.20 : 1,031,712.30 = 475,231.80 : x
  2. Step 2: Convert to fraction form
    687,808.20/1,031,712.30 = 475,231.80/x
  3. Step 3: Cross multiply
    687,808.20x = 1,031,712.30 × 475,231.80
  4. Step 4: Simplify right side
    687,808.20x = 490,302,493,411.14
  5. Step 5: Solve for x
    x = 490,302,493,411.14/687,808.20
  6. Step 6: Final answer
    x = 712,847.70

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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.