Home / 687,865.20-1,031,797.80-519,903.60

Finding the Fourth Proportional to 687,865.20, 1,031,797.80 and 519,903.60

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Solution

The fourth proportional to 687,865.20, 1,031,797.80 and 519,903.60 is: 779,855.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,865.20 : 1,031,797.80 = 519,903.60 : x
  2. Step 2: Convert to fraction form
    687,865.20/1,031,797.80 = 519,903.60/x
  3. Step 3: Cross multiply
    687,865.20x = 1,031,797.80 × 519,903.60
  4. Step 4: Simplify right side
    687,865.20x = 536,435,390,692.08
  5. Step 5: Solve for x
    x = 536,435,390,692.08/687,865.20
  6. Step 6: Final answer
    x = 779,855.40

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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.