Home / 1,378,385.69-1,901,893.52-805,315.15

Finding the Fourth Proportional to 1,378,385.69, 1,901,893.52 and 805,315.15

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Solution

The fourth proportional to 1,378,385.69, 1,901,893.52 and 805,315.15 is: 1,111,172.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,378,385.69 : 1,901,893.52 = 805,315.15 : x
  2. Step 2: Convert to fraction form
    1,378,385.69/1,901,893.52 = 805,315.15/x
  3. Step 3: Cross multiply
    1,378,385.69x = 1,901,893.52 × 805,315.15
  4. Step 4: Simplify right side
    1,378,385.69x = 1,531,623,651,806.78
  5. Step 5: Solve for x
    x = 1,531,623,651,806.78/1,378,385.69
  6. Step 6: Final answer
    x = 1,111,172.05

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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.