Home / 687,315.81-1,031,122.01-207,503.80

Finding the Fourth Proportional to 687,315.81, 1,031,122.01 and 207,503.80

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Solution

The fourth proportional to 687,315.81, 1,031,122.01 and 207,503.80 is: 311,300.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,315.81 : 1,031,122.01 = 207,503.80 : x
  2. Step 2: Convert to fraction form
    687,315.81/1,031,122.01 = 207,503.80/x
  3. Step 3: Cross multiply
    687,315.81x = 1,031,122.01 × 207,503.80
  4. Step 4: Simplify right side
    687,315.81x = 213,961,735,338.64
  5. Step 5: Solve for x
    x = 213,961,735,338.64/687,315.81
  6. Step 6: Final answer
    x = 311,300.47

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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.