Home / 687,772.80-1,031,659.20-435,830.40

Finding the Fourth Proportional to 687,772.80, 1,031,659.20 and 435,830.40

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Solution

The fourth proportional to 687,772.80, 1,031,659.20 and 435,830.40 is: 653,745.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,772.80 : 1,031,659.20 = 435,830.40 : x
  2. Step 2: Convert to fraction form
    687,772.80/1,031,659.20 = 435,830.40/x
  3. Step 3: Cross multiply
    687,772.80x = 1,031,659.20 × 435,830.40
  4. Step 4: Simplify right side
    687,772.80x = 449,628,441,799.68
  5. Step 5: Solve for x
    x = 449,628,441,799.68/687,772.80
  6. Step 6: Final answer
    x = 653,745.60

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Similar ratio
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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.