Home / 745,488.90-1,028,786.40-405,956.88

Finding the Fourth Proportional to 745,488.90, 1,028,786.40 and 405,956.88

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Solution

The fourth proportional to 745,488.90, 1,028,786.40 and 405,956.88 is: 560,226.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    745,488.90 : 1,028,786.40 = 405,956.88 : x
  2. Step 2: Convert to fraction form
    745,488.90/1,028,786.40 = 405,956.88/x
  3. Step 3: Cross multiply
    745,488.90x = 1,028,786.40 × 405,956.88
  4. Step 4: Simplify right side
    745,488.90x = 417,642,917,130.43
  5. Step 5: Solve for x
    x = 417,642,917,130.43/745,488.90
  6. Step 6: Final answer
    x = 560,226.88

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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.