Home / 687,911.20-1,031,866.80-477,959.20

Finding the Fourth Proportional to 687,911.20, 1,031,866.80 and 477,959.20

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Solution

The fourth proportional to 687,911.20, 1,031,866.80 and 477,959.20 is: 716,938.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,911.20 : 1,031,866.80 = 477,959.20 : x
  2. Step 2: Convert to fraction form
    687,911.20/1,031,866.80 = 477,959.20/x
  3. Step 3: Cross multiply
    687,911.20x = 1,031,866.80 × 477,959.20
  4. Step 4: Simplify right side
    687,911.20x = 493,190,230,234.56
  5. Step 5: Solve for x
    x = 493,190,230,234.56/687,911.20
  6. Step 6: Final answer
    x = 716,938.80

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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.