Home / 745,490.40-1,028,788.47-405,958.38

Finding the Fourth Proportional to 745,490.40, 1,028,788.47 and 405,958.38

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Solution

The fourth proportional to 745,490.40, 1,028,788.47 and 405,958.38 is: 560,228.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    745,490.40 : 1,028,788.47 = 405,958.38 : x
  2. Step 2: Convert to fraction form
    745,490.40/1,028,788.47 = 405,958.38/x
  3. Step 3: Cross multiply
    745,490.40x = 1,028,788.47 × 405,958.38
  4. Step 4: Simplify right side
    745,490.40x = 417,645,300,643.88
  5. Step 5: Solve for x
    x = 417,645,300,643.88/745,490.40
  6. Step 6: Final answer
    x = 560,228.95

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Double scale
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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.