Home / 687,919.20-1,031,878.80-519,957.60

Finding the Fourth Proportional to 687,919.20, 1,031,878.80 and 519,957.60

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Solution

The fourth proportional to 687,919.20, 1,031,878.80 and 519,957.60 is: 779,936.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,919.20 : 1,031,878.80 = 519,957.60 : x
  2. Step 2: Convert to fraction form
    687,919.20/1,031,878.80 = 519,957.60/x
  3. Step 3: Cross multiply
    687,919.20x = 1,031,878.80 × 519,957.60
  4. Step 4: Simplify right side
    687,919.20x = 536,533,224,338.88
  5. Step 5: Solve for x
    x = 536,533,224,338.88/687,919.20
  6. Step 6: Final answer
    x = 779,936.40

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1.5x scale

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.