Home / 1,383,999.84-1,909,876.47-811,421.37

Finding the Fourth Proportional to 1,383,999.84, 1,909,876.47 and 811,421.37

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Solution

The fourth proportional to 1,383,999.84, 1,909,876.47 and 811,421.37 is: 1,119,736.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,383,999.84 : 1,909,876.47 = 811,421.37 : x
  2. Step 2: Convert to fraction form
    1,383,999.84/1,909,876.47 = 811,421.37/x
  3. Step 3: Cross multiply
    1,383,999.84x = 1,909,876.47 × 811,421.37
  4. Step 4: Simplify right side
    1,383,999.84x = 1,549,714,581,818.16
  5. Step 5: Solve for x
    x = 1,549,714,581,818.16/1,383,999.84
  6. Step 6: Final answer
    x = 1,119,736.10

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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.