Home / 1,378,389.96-1,901,899.36-805,319.40

Finding the Fourth Proportional to 1,378,389.96, 1,901,899.36 and 805,319.40

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Solution

The fourth proportional to 1,378,389.96, 1,901,899.36 and 805,319.40 is: 1,111,177.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,378,389.96 : 1,901,899.36 = 805,319.40 : x
  2. Step 2: Convert to fraction form
    1,378,389.96/1,901,899.36 = 805,319.40/x
  3. Step 3: Cross multiply
    1,378,389.96x = 1,901,899.36 × 805,319.40
  4. Step 4: Simplify right side
    1,378,389.96x = 1,531,636,451,455.58
  5. Step 5: Solve for x
    x = 1,531,636,451,455.58/1,378,389.96
  6. Step 6: Final answer
    x = 1,111,177.89

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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.