Home / 815,420.45-1,125,843.17-509,634.28

Finding the Fourth Proportional to 815,420.45, 1,125,843.17 and 509,634.28

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Solution

The fourth proportional to 815,420.45, 1,125,843.17 and 509,634.28 is: 703,647.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,420.45 : 1,125,843.17 = 509,634.28 : x
  2. Step 2: Convert to fraction form
    815,420.45/1,125,843.17 = 509,634.28/x
  3. Step 3: Cross multiply
    815,420.45x = 1,125,843.17 × 509,634.28
  4. Step 4: Simplify right side
    815,420.45x = 573,768,276,495.04
  5. Step 5: Solve for x
    x = 573,768,276,495.04/815,420.45
  6. Step 6: Final answer
    x = 703,647.15

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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.