Home / 687,120.40-1,030,200.60-406,493.20

Finding the Fourth Proportional to 687,120.40, 1,030,200.60 and 406,493.20

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Solution

The fourth proportional to 687,120.40, 1,030,200.60 and 406,493.20 is: 609,455.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,120.40 : 1,030,200.60 = 406,493.20 : x
  2. Step 2: Convert to fraction form
    687,120.40/1,030,200.60 = 406,493.20/x
  3. Step 3: Cross multiply
    687,120.40x = 1,030,200.60 × 406,493.20
  4. Step 4: Simplify right side
    687,120.40x = 418,769,538,535.92
  5. Step 5: Solve for x
    x = 418,769,538,535.92/687,120.40
  6. Step 6: Final answer
    x = 609,455.84

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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.