Home / 687,316.81-1,031,123.51-207,504.80

Finding the Fourth Proportional to 687,316.81, 1,031,123.51 and 207,504.80

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Solution

The fourth proportional to 687,316.81, 1,031,123.51 and 207,504.80 is: 311,301.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,316.81 : 1,031,123.51 = 207,504.80 : x
  2. Step 2: Convert to fraction form
    687,316.81/1,031,123.51 = 207,504.80/x
  3. Step 3: Cross multiply
    687,316.81x = 1,031,123.51 × 207,504.80
  4. Step 4: Simplify right side
    687,316.81x = 213,963,077,717.85
  5. Step 5: Solve for x
    x = 213,963,077,717.85/687,316.81
  6. Step 6: Final answer
    x = 311,301.97

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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.