Home / 696,911.20-961,679.04-390,944.80

Finding the Fourth Proportional to 696,911.20, 961,679.04 and 390,944.80

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Solution

The fourth proportional to 696,911.20, 961,679.04 and 390,944.80 is: 539,471.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    696,911.20 : 961,679.04 = 390,944.80 : x
  2. Step 2: Convert to fraction form
    696,911.20/961,679.04 = 390,944.80/x
  3. Step 3: Cross multiply
    696,911.20x = 961,679.04 × 390,944.80
  4. Step 4: Simplify right side
    696,911.20x = 375,963,419,956.99
  5. Step 5: Solve for x
    x = 375,963,419,956.99/696,911.20
  6. Step 6: Final answer
    x = 539,471.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.