Home / 728,991,087.80-1,005,808,359.60-415,610,958.92

Finding the Fourth Proportional to 728,991,087.80, 1,005,808,359.60 and 415,610,958.92

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Solution

The fourth proportional to 728,991,087.80, 1,005,808,359.60 and 415,610,958.92 is: 573,429,475.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,991,087.80 : 1,005,808,359.60 = 415,610,958.92 : x
  2. Step 2: Convert to fraction form
    728,991,087.80/1,005,808,359.60 = 415,610,958.92/x
  3. Step 3: Cross multiply
    728,991,087.80x = 1,005,808,359.60 × 415,610,958.92
  4. Step 4: Simplify right side
    728,991,087.80x = 418,024,976,818,079,168
  5. Step 5: Solve for x
    x = 418,024,976,818,079,168/728,991,087.80
  6. Step 6: Final answer
    x = 573,429,475.09

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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.