Home / 687,776.40-1,031,810.40-207,964.80

Finding the Fourth Proportional to 687,776.40, 1,031,810.40 and 207,964.80

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Solution

The fourth proportional to 687,776.40, 1,031,810.40 and 207,964.80 is: 311,991.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,776.40 : 1,031,810.40 = 207,964.80 : x
  2. Step 2: Convert to fraction form
    687,776.40/1,031,810.40 = 207,964.80/x
  3. Step 3: Cross multiply
    687,776.40x = 1,031,810.40 × 207,964.80
  4. Step 4: Simplify right side
    687,776.40x = 214,580,243,473.92
  5. Step 5: Solve for x
    x = 214,580,243,473.92/687,776.40
  6. Step 6: Final answer
    x = 311,991.29

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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.