Home / 745,134.78-1,028,286.12-405,603

Finding the Fourth Proportional to 745,134.78, 1,028,286.12 and 405,603

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Solution

The fourth proportional to 745,134.78, 1,028,286.12 and 405,603 is: 559,732.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    745,134.78 : 1,028,286.12 = 405,603 : x
  2. Step 2: Convert to fraction form
    745,134.78/1,028,286.12 = 405,603/x
  3. Step 3: Cross multiply
    745,134.78x = 1,028,286.12 × 405,603
  4. Step 4: Simplify right side
    745,134.78x = 417,075,935,130.36
  5. Step 5: Solve for x
    x = 417,075,935,130.36/745,134.78
  6. Step 6: Final answer
    x = 559,732.21

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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.