Home / 687,563.20-1,031,344.80-288,071.20

Finding the Fourth Proportional to 687,563.20, 1,031,344.80 and 288,071.20

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Solution

The fourth proportional to 687,563.20, 1,031,344.80 and 288,071.20 is: 432,106.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,563.20 : 1,031,344.80 = 288,071.20 : x
  2. Step 2: Convert to fraction form
    687,563.20/1,031,344.80 = 288,071.20/x
  3. Step 3: Cross multiply
    687,563.20x = 1,031,344.80 × 288,071.20
  4. Step 4: Simplify right side
    687,563.20x = 297,100,734,149.76
  5. Step 5: Solve for x
    x = 297,100,734,149.76/687,563.20
  6. Step 6: Final answer
    x = 432,106.80

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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.