Home / 663,078.04-915,023.10-405,386.56

Finding the Fourth Proportional to 663,078.04, 915,023.10 and 405,386.56

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Solution

The fourth proportional to 663,078.04, 915,023.10 and 405,386.56 is: 559,418.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,078.04 : 915,023.10 = 405,386.56 : x
  2. Step 2: Convert to fraction form
    663,078.04/915,023.10 = 405,386.56/x
  3. Step 3: Cross multiply
    663,078.04x = 915,023.10 × 405,386.56
  4. Step 4: Simplify right side
    663,078.04x = 370,938,066,829.54
  5. Step 5: Solve for x
    x = 370,938,066,829.54/663,078.04
  6. Step 6: Final answer
    x = 559,418.42

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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.