Home / 687,718.80-1,031,578.20-628,621.20

Finding the Fourth Proportional to 687,718.80, 1,031,578.20 and 628,621.20

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Solution

The fourth proportional to 687,718.80, 1,031,578.20 and 628,621.20 is: 942,931.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,718.80 : 1,031,578.20 = 628,621.20 : x
  2. Step 2: Convert to fraction form
    687,718.80/1,031,578.20 = 628,621.20/x
  3. Step 3: Cross multiply
    687,718.80x = 1,031,578.20 × 628,621.20
  4. Step 4: Simplify right side
    687,718.80x = 648,471,925,977.84
  5. Step 5: Solve for x
    x = 648,471,925,977.84/687,718.80
  6. Step 6: Final answer
    x = 942,931.80

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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.