Home / 730,455.64-1,008,128.91-420,351.85

Finding the Fourth Proportional to 730,455.64, 1,008,128.91 and 420,351.85

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Solution

The fourth proportional to 730,455.64, 1,008,128.91 and 420,351.85 is: 580,143.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    730,455.64 : 1,008,128.91 = 420,351.85 : x
  2. Step 2: Convert to fraction form
    730,455.64/1,008,128.91 = 420,351.85/x
  3. Step 3: Cross multiply
    730,455.64x = 1,008,128.91 × 420,351.85
  4. Step 4: Simplify right side
    730,455.64x = 423,768,852,356.98
  5. Step 5: Solve for x
    x = 423,768,852,356.98/730,455.64
  6. Step 6: Final answer
    x = 580,143.17

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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.